@@DontFollowMe666 Z is for 25 meters because there is a 2 click difference between zero at 25 meters and zero at 300 meters. Technically, Z will have the gun zeroed at 25 meters and about 250-260 meters.
Ive read all the posts and there's some comments which are not clear so here's everything there is to know about the matter. The literal definition of a ZERO and in fact where the word comes from is when the line of sight and bullet path intersect and the resulting value in any form of measurement is zero. Properly adjusting the M4, or M16-A4’s sights for a 300-meter Battle Sight Zero (BSZ) will sync the sights for a Bullet Drop Compensation function (BDC). The “Battle Sight Zero” supports engagement of unknown distance targets, allowing the shooter to aim center mass on an “E” type target and achieve a hit from muzzle to 300 meters with bullet impacting no more than 10 inches above point of aim at about 170 meters, and hit to 350 meters with bullet impacting no more than 10 inches below point of aim. In fact, utilizing the whole 20 inches of target below center of mass hold allows the shooter to hit a target out to 400 meters. Once zeroed for a 300 meter Battle Sight Zero, the rear sight elevation wheel can now be hastily adjusted for engagement of known distance targets beyond 300 meters. This adjustment is known as Bullet Drop Compensation. The numbers on the wheel represent distances in meters. So, from the elevation wheel’s 300 meter setting, clicking up to 4, or 5 adjusts the trajectory of the round to engage targets at the corresponding distance (i.e., 4=400m, 5=500m). And one full revolution up from 300 meter setting will correlate to the number 6 on the left side of the 3, thus setting BDC for 600 meters. Begin zeroing by depressing front sight detent with tip of bullet, or a sight adjustment tool, permitting the sight post to be rotated in direction as needed for one of its flange indents to engage the detent where the flange is flush to the deck of the front sight base. Next, set the rear sight small diameter aperture, also known as the “daylight” aperture, in the up position (the larger aperture is only used when visibility is limited, and/or shooting inside 200 meters) and turn rear sight windage knob in direction needed to align index line located on the top of the large aperture’s outside rim with center index line located on the back of the rear sight’s base. Next, turn the rear sight elevation wheel counterclockwise to bottom it out and then turn it (4) clicks clockwise to index the wheel’s 6/3 marking to the index line located on the left side of the carry handle above the elevation wheel. Now, because the path of the bullet will intersect line of sight twice when zeroing to any finite distance, this is how it is possible to sight-in the M16-A4 for a 300 meter zero at 32 meters, or the M4 at 25 meters from elevation wheel set at 6/3 marking per previous paragraph’s instructions. If precluded to a 25 meter range when sighting-in the M16-A4, you can compensate for the 32 meter to 25 meter offset by setting the M16-A4’s elevation wheel 2 clicks clockwise beyond the 6/3 marking, which will place the elevation wheel at the “Z” marking. Then, after sighting-in the M16-A4 at 25 meters, turn the elevation wheel 2 clicks counterclockwise from the “Z” marking, which will index the 6/3 marking on the elevation wheel back to the index line on the carry handle above the elevation wheel. Thus set, the rifle will be zeroed for 300 meters and synchronized for a Bullet Drop Compensation function. Zeroing Part 2 So, shooting M855 ammunition, which has external ballistics matching the M16-A4 and M4 detachable carry handle sight’s Bullet Drop Compensation function, shoot at a big enough target to recognize having a consistent sight picture when the target is set out to available sight-in distance; and, using a center of mass hold, shoot 5 rounds from a stable position to produce a group on the target. Triangulate the group, excluding bad shots, to define the group’s center point; and adjust sights to move the next grouping to target’s center. Adjust elevation from front sight by turning sight post in counterclockwise direction to move bullet point of impact down. Turn the post in clockwise direction to move the bullet point of impact up. One click of post will move M16-A4 bullet point of impact 1.25 MOA, or M4 bullet point of impact 1.75 MOA. Adjust windage by turning windage knob clockwise to move bullet point of impact right. Turn knob counterclockwise to move bullet point of impact left. One click of knob will move M16-A4 bullet point of impact .50 MOA, or M4 bullet point of impact .75 MOA. Note: The 300 meter zero must be tested by shooting to 300 meters, adjusting front sight as needed to correct elevation error. Also recognize that since horizontal bullet displacement could have been caused by wind, or poor trigger control, windage adjustment should not be made at this time but instead retain the windage knob’s no-wind zero condition made at sight-in distance until shooter/target analysis via call/strike corollary can identify wind, as need for a temporary windage adjustment, or refinement of the no-wind zero as cause to adjust windage knob (read Compensation for Wind and Shooter/Target Analysis sessions).
Good informative video. I've been shooting these since the first one they gave me, upon taking away my M14, in 1971 and I've never heard it referred to a a bullet drop compensator by anyone.
I believe the Z setting is only for the M16, e.g. 20" barrel. The M4 (14.5") should actually be flush at 6/3 when zeroing. Alternatively, you can just run a ballistic calculator for M855 and find the intersection at 300m for your given barrel length/muzzle velocity and zero at the near range where elevation is 0" (point of aim) without using the Z. The whole 25m/Z thing is just to accommodate standard zero ranges in the Army. The BDC is also designed for M855, not M193, but they are pretty similar out to about 400, within a few inches at most.
Thank you so much for going over those kind of sights, i had no clue how they worked and your video was exactly what i was looking for.. Very informative!
This video is timeless it comes on my feed atleast once a year! Just make sure if you are going A4 that your handle is milspec if you have a f marked FSB. If your handle is commercial you will be off
You can zero these type of sights at 100 meters using the Improved Battle Sight Zero, and it will keep all of the elevation adjustment correct. Using the IBZ will allow you to have a 100m and 50m zero and keep all elevation adjustments correct.
Yep. I just learned how to adjust the elevation barrel to allow 8 negative clicks below 6/3. (2 for a buffer to prevent bottoming the mechanism). Allows the peep to be used down to 100 meters easily. 100, 50, 300, 25 meters and up. It is a difficult concept at first, till you study the ballistic graph for a 5.56.
Great explanation. I've been trying to update my knowledge from the M-14/very early M-16 days. It seems so strange to me to have an AR15/M16 style rifle without a carry handle.
Good bit of information that the 8/3 sight wheel is for the M16A2 or AR-15, both with 20" 1in7"twist barrels. The 6/3 sight wheel is for the M4 and 16" 1in7"twist AR-15s.
the M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you.
Been wasting a lotttt of ammo trying to figure out why this set up hasn’t been working! Very helpful thank you sir. Can’t wait to see where I’m at when I go shooting next. Front sight adjustments tricky to find honestly if ya don’t know.
Super Great Video for a new AR Owner like me. Very Helpful with my Wyndham Weaponry Dissipator with the A4 Dual Aperture Rear Sights. The Owners Manual is Good but Your Instructions are Super Clear. Peace Out...... Tucson Jack
Great and simple explanation. I like to use my rifle the way it was designed. When you do this you get great versatility in a simple manner. You can also use the RIBZ method and get even more close range precision with the small aperture while retaining all you have just said.
Today I shot my ruger 556 and bushmaster ar15 5.56. Sighted in on the 6/3 and at 300 yds 4 inch groups. 400 yds 4 inch groups and 500 yds 7 inch groups. The bushmaster 1 in 9 twist and ruger 1 in 8 twist. Using 55grain fmj bt 3120 muzzle velocity. Thanks to captain. Thanks kap
@@EN2HAMMSTERI haven’t seen this in the comments but what carry handle is that? I like those knobs much more compared to the giant knobs that are coming standard on virtually all carry handles offered today.
Why does it have to be 2 clicks up on the Z? If you leave it at the 6/3 setting you wont be able to hit paper? What happens when you move it to the right on the Z?
@@EN2HAMMSTER it absolutely has to be 2 clicks right on the Z setting to zero it in? If you leave it at the 6/3 setting what happens? You wont ne able to get on paper? Sorry and thanks
when you sight in 6/3 at 25 meters, what sight do you use? the small one right? also when you zero 6/3 at 25 meters with small sight, then flip the bigger sight up, that changes it to a 200 meter zero?
Always use small sight. BZO in at 36 yards for a 300. adjust rear sight up 3 clicks. one click for every 100 yards. 3 clicks up for 300 yards. this the USMC way. USMC uses yards not meters. the hole 25meter thing is how the army does it. this does NOT mater if A2 or A4,M4 with a DCH on. i never used the big sight when i was in the Marines.
question for the front sight F marked ft post sight and non F marked post sites? would either one of these make a difference on sighting it with your information??
The Z who told about the "Z"? I am a former US Marine we have a complete different way to BZO from the Army. which in my onion is better system. if your interested in the USMC way (proven system) let me know. i will walk you through it. get you shooting out at the 500 with iron sights like we did in the marines.
I understand the procedure, but not the reasoning. Why do you raise the bullet drop compensator to shoot at 25m and lower it for 300m? Doesn't raising it cause you to shoot higher to compensate for bullet drop?
@Cav Trooper 19D I have since found an answer to this question. I don't know if it is correct, but it satisfies me. From what I understand, the rifle is designed with the barrel pointing slightly up. So the bullet travels in an arc. It rises, levels off, and then drops (like a football pass.) At 25 meters the bullet is still traveling upwards, and that is why aiming center mass at 25m would end up being low at 300 m.
@Cav Trooper 19D Is this Army doctrine? Because this is not USMC doctrine. The M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you
the M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you.
No. the M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you. Where did you hear this? about 20in is for 8/3? i am hearing this a lot.
The detachable carry handle for M4 and A4 is the same but since the sight radius of these two rifles is different so is the click value: M4 .75 MOA and A4 .5 MOA. Now because the A4 produces a foster trajectory than the M4 it is zeroed at 25 meters at the Z setting rather than at the 6/3 setting and then the elevation wheel is turned back to the 6/3 setting which will yield a 300 meter zero.
okay- there are two separate things going on here. these sights have distance settings marked on the elevation turret. those markings will only be correct if you zero the rifle with the turret on the correct spot and use the FRONT sight to zero your elevation. If you don’t set the sights in the right place first, you could go to the range and simply click your way to a good zero. but if you do that the distance markings on the sight won’t mean anything.
@Cav Trooper 19D thanks so much will subscribe right now, one more thing, after zeroing it in ar 25 meters then I return it back to 6/3 or do I leave it at Z , thanks again So much. Sorry for the noob questions
the M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you
Why are so many of these videos so different. I was told on a 16" barrel put sight on 300-600. do not put on z or up a notch to sight in. on a 20 ' Barrel to put on the z. I dont know what is right.
You can get the Army or Marine M16 field manual off amazon for super cheap. It explains all the differences between the variants and answers the question you just asked.
On the 16" barrel adjust your BDC dial (Bullet Drop Compensator) to 3/6 (300/600), and leave it there. Flip your rear peep to the 300 meter aperture (smaller peep) and dial it to center (observe the hash-marks), and leave it there. Flush-up the front sight post base with the front sight housing, and you are set to "mechanical zero." You are now ready to begin your "zeroing process;" you may proceed to the range.
A lot of this info coming out is from Army doctrine. someone turns around and puts in thier words. Being a former Marine, Marines have a different way of doing things. we had to shoot out to the 500 with A2 "iron sights" The M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100 ( ARMY does not teach this I guess?) .This is USMC doctrine. Marines BZO different and shoot at 36 yard not the 25 meters. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you. Marines dont do this Z crap...lol
@@esmith3438 .. I've been studying these sights. The 6/3 is the detachable handle with a "Z" index. This is 2 clicks above the 6/3 index and "Z" is used for zeroing the A4 20" barrel at 25M. When zeroing the M4 which is a 14.5" barrel the 6/3 index is to be used. This is Army doctrine and the differences are due to different velocity coming out of the different length barrels. Also, there is a difference in the MOA values between the 8/3 and the 6/3 handle when making modification to the sight wheel for IBZO and RIBZ.
Yes, & thats what a lot of folks finally do. There are just too many crap companies making products for AR's. You have to make sure it's a military spec sight for all this to work right. For the BDC to work right.
Best explanation of the A2/A4 carry handle sights and the differences between the two. Well done sir. Thank you.
EVERY AR owner needs to watch your video. Thanks for the time and effort you put into this video. ALL BLACK RIFLES MATTER
could not agree more
What does changing the it to the Z do? What happens of I just leave it on 6/3 and not Z
@@DontFollowMe666 Z is for 25 meters because there is a 2 click difference between zero at 25 meters and zero at 300 meters. Technically, Z will have the gun zeroed at 25 meters and about 250-260 meters.
Ive read all the posts and there's some comments which are not clear so here's everything there is to know about the matter.
The literal definition of a ZERO and in fact where the word comes from is when the line of sight and bullet path intersect and the resulting value in any form of measurement is zero.
Properly adjusting the M4, or M16-A4’s sights for a 300-meter Battle Sight Zero (BSZ) will sync the sights for a Bullet Drop Compensation function (BDC).
The “Battle Sight Zero” supports engagement of unknown distance targets, allowing the shooter to aim center mass on an “E” type target and achieve a hit from muzzle to 300 meters with bullet impacting no more than 10 inches above point of aim at about 170 meters, and hit to 350 meters with bullet impacting no more than 10 inches below point of aim. In fact, utilizing the whole 20 inches of target below center of mass hold allows the shooter to hit a target out to 400 meters.
Once zeroed for a 300 meter Battle Sight Zero, the rear sight elevation wheel can now be hastily adjusted for engagement of known distance targets beyond 300 meters. This adjustment is known as Bullet Drop Compensation. The numbers on the wheel represent distances in meters. So, from the elevation wheel’s 300 meter setting, clicking up to 4, or 5 adjusts the trajectory of the round to engage targets at the corresponding distance (i.e., 4=400m, 5=500m). And one full revolution up from 300 meter setting will correlate to the number 6 on the left side of the 3, thus setting BDC for 600 meters.
Begin zeroing by depressing front sight detent with tip of bullet, or a sight adjustment tool, permitting the sight post to be rotated in direction as needed for one of its flange indents to engage the detent where the flange is flush to the deck of the front sight base. Next, set the rear sight small diameter aperture, also known as the “daylight” aperture, in the up position (the larger aperture is only used when visibility is limited, and/or shooting inside 200 meters) and turn rear sight windage knob in direction needed to align index line located on the top of the large aperture’s outside rim with center index line located on the back of the rear sight’s base. Next, turn the rear sight elevation wheel counterclockwise to bottom it out and then turn it (4) clicks clockwise to index the wheel’s 6/3 marking to the index line located on the left side of the carry handle above the elevation wheel.
Now, because the path of the bullet will intersect line of sight twice when zeroing to any finite distance, this is how it is possible to sight-in the M16-A4 for a 300 meter zero at 32 meters, or the M4 at 25 meters from elevation wheel set at 6/3 marking per previous paragraph’s instructions. If precluded to a 25 meter range when sighting-in the M16-A4, you can compensate for the 32 meter to 25 meter offset by setting the M16-A4’s elevation wheel 2 clicks clockwise beyond the 6/3 marking, which will place the elevation wheel at the “Z” marking. Then, after sighting-in the M16-A4 at 25 meters, turn the elevation wheel 2 clicks counterclockwise from the “Z” marking, which will index the 6/3 marking on the elevation wheel back to the index line on the carry handle above the elevation wheel. Thus set, the rifle will be zeroed for 300 meters and synchronized for a Bullet Drop Compensation function.
Zeroing Part 2
So, shooting M855 ammunition, which has external ballistics matching the M16-A4 and M4 detachable carry handle sight’s Bullet Drop Compensation function, shoot at a big enough target to recognize having a consistent sight picture when the target is set out to available sight-in distance; and, using a center of mass hold, shoot 5 rounds from a stable position to produce a group on the target. Triangulate the group, excluding bad shots, to define the group’s center point; and adjust sights to move the next grouping to target’s center. Adjust elevation from front sight by turning sight post in counterclockwise direction to move bullet point of impact down. Turn the post in clockwise direction to move the bullet point of impact up. One click of post will move M16-A4 bullet point of impact 1.25 MOA, or M4 bullet point of impact 1.75 MOA. Adjust windage by turning windage knob clockwise to move bullet point of impact right. Turn knob counterclockwise to move bullet point of impact left. One click of knob will move M16-A4 bullet point of impact .50 MOA, or M4 bullet point of impact .75 MOA.
Note: The 300 meter zero must be tested by shooting to 300 meters, adjusting front sight as needed to correct elevation error. Also recognize that since horizontal bullet displacement could have been caused by wind, or poor trigger control, windage adjustment should not be made at this time but instead retain the windage knob’s no-wind zero condition made at sight-in distance until shooter/target analysis via call/strike corollary can identify wind, as need for a temporary windage adjustment, or refinement of the no-wind zero as cause to adjust windage knob (read Compensation for Wind and Shooter/Target Analysis sessions).
Hands down the best tutorial video I’ve watched . Thank you !
Not 2 clicks up on the M4, just 2 clicks up on 20 inch barrel M16- A4, and after zeroing at 25 meters the sight must be turned back to 6/3 position.
Good informative video. I've been shooting these since the first one they gave me, upon taking away my M14, in 1971 and I've never heard it referred to a a bullet drop compensator by anyone.
Best video I've found for zeroing my A4 sight. Thank you!
I believe the Z setting is only for the M16, e.g. 20" barrel. The M4 (14.5") should actually be flush at 6/3 when zeroing. Alternatively, you can just run a ballistic calculator for M855 and find the intersection at 300m for your given barrel length/muzzle velocity and zero at the near range where elevation is 0" (point of aim) without using the Z. The whole 25m/Z thing is just to accommodate standard zero ranges in the Army. The BDC is also designed for M855, not M193, but they are pretty similar out to about 400, within a few inches at most.
Thank you so much for going over those kind of sights, i had no clue how they worked and your video was exactly what i was looking for.. Very informative!
Great block of instruction ! 👍 🇺🇸
Hands down the best video on the subject. Thanks for doing such a easy to understand instruction of the A2/A4 rear sights.
Glad you refreshed my memory it's been a while since I've been in the Marines on the rifle range , 28 years to be exact damn I'm old lol
Ty
Great video I haven't see that sight that we'll explained since 1966. Thanks for the memory.
This video is timeless it comes on my feed atleast once a year!
Just make sure if you are going A4 that your handle is milspec if you have a f marked FSB.
If your handle is commercial you will be off
You can zero these type of sights at 100 meters using the Improved Battle Sight Zero, and it will keep all of the elevation adjustment correct. Using the IBZ will allow you to have a 100m and 50m zero and keep all elevation adjustments correct.
Yep.
I just learned how to adjust the elevation barrel to allow 8 negative clicks below 6/3.
(2 for a buffer to prevent bottoming the mechanism).
Allows the peep to be used down to 100 meters easily.
100, 50, 300, 25 meters and up.
It is a difficult concept at first, till you study the ballistic graph for a 5.56.
Great explanation. I've been trying to update my knowledge from the M-14/very early M-16 days. It seems so strange to me to have an AR15/M16 style rifle without a carry handle.
Good bit of information that the 8/3 sight wheel is for the M16A2 or AR-15, both with 20" 1in7"twist barrels. The 6/3 sight wheel is for the M4 and 16" 1in7"twist AR-15s.
the M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you.
Thank you for this very clearly stated explanation. This is the only clearly understandable video on this subject I could find.
Been wasting a lotttt of ammo trying to figure out why this set up hasn’t been working! Very helpful thank you sir. Can’t wait to see where I’m at when I go shooting next. Front sight adjustments tricky to find honestly if ya don’t know.
great vid.
great instruction "
great instructor "
Thank you friend"
Man!!! I’m totally new to the AR platform and this video has been instrumental in my learning to sight in this rifle
I was always told that on a 16" barrel like yours there, and a removeable carry handle, to NOT use the Z and sight in at the 6/3 mark.
Super Great Video for a new AR Owner like me. Very Helpful with my Wyndham Weaponry Dissipator with the A4 Dual Aperture Rear Sights. The Owners Manual is Good but Your Instructions are Super Clear. Peace Out...... Tucson Jack
Great and simple explanation. I like to use my rifle the way it was designed. When you do this you get great versatility in a simple manner. You can also use the RIBZ method and get even more close range precision with the small aperture while retaining all you have just said.
It's actually an A3 sight. Flat-top AR uppers are called "A3", even though the M16A3 has an A2 upper.
Man I have had this gun for long time never knew all this information. Great video.
Today I shot my ruger 556 and bushmaster ar15 5.56. Sighted in on the 6/3 and at 300 yds 4 inch groups. 400 yds 4 inch groups and 500 yds 7 inch groups. The bushmaster 1 in 9 twist and ruger 1 in 8 twist. Using 55grain fmj bt 3120 muzzle velocity. Thanks to captain. Thanks kap
Good❤
The bushmaster ar15 and ruger are 16 inch barrels the cap was correct. Thanks cap
Excellent video, thanks.
Nice video and nice paint
Excellent explanation.
Thank you
@@EN2HAMMSTERI haven’t seen this in the comments but what carry handle is that? I like those knobs much more compared to the giant knobs that are coming standard on virtually all carry handles offered today.
@@RaymondMares It is an older carry handle from Armalite
@@EN2HAMMSTERthank you sir!
Well done. Thank you.
Excellent Information. Well done. Thank You !!!
Thank you for the education, Sir...
now I learnt. thanks!
Lot of great information thanks for the video !
Thank you 😊
Excellent!!!
Thank you this was extremely helpful
What part do you have sitting beside the rifle that has the A2 carry handle/front site on it? I would like to upgrade mine to this style.
It is an A2 upper receiver
Why does it have to be 2 clicks up on the Z? If you leave it at the 6/3 setting you wont be able to hit paper? What happens when you move it to the right on the Z?
Bc if it's not on the z it's not at mechanical zero that's what the z indicator is on some of those for
Superb Teaching!"
Thank you !
nice thanks
subscribed. Great info thank you .
Perfect 👌 thank you
What if you're running a short barrel like 11.5?
So which aperature do you use for say 250 yards? the 0-2 or the peep?
The small peep is more accurate , the larger aperture is more for low light.
I have never heard of these zeroed in meters in the military it was always 25 yards.
Where can I get that A2 fixed carry handle??
I got mine at JSE Surplus last year. I don't know if they have any now.
Rock river arms
Very good instructions. I only have 50 feet to work with. If I get my zero at 50 feet where will it hit at 50 yards?
25 meters is 75 feet
Why is fixed carry handle 8/3? Removable handle 6/3???? It’s the same rifle…..
Less space on the removable for that much adjustment.
Those thumb screws look aftermarket. Where did you get em?
How would you recommend i set mine up i have a 11.5” barrel tho im not trying to go past 100-150 yards
What make is that detachable carry handle? I've never seen those kind of nuts before.
If I remember correctly it was from Armalite
Great info, ty
great video
Now just to find a decent rear sight, I prefer irons.
what brand is that carry handle
Great video. I noticed your using a m4 for this video, will the same information you give work for the ar-15 rifle with a carry handle? Thank you.
Yes
@@EN2HAMMSTER it absolutely has to be 2 clicks right on the Z setting to zero it in? If you leave it at the 6/3 setting what happens? You wont ne able to get on paper? Sorry and thanks
which carry handle you are install
when you sight in 6/3 at 25 meters, what sight do you use? the small one right?
also when you zero 6/3 at 25 meters with small sight, then flip the bigger sight up, that changes it to a 200 meter zero?
Always use small sight. BZO in at 36 yards for a 300. adjust rear sight up 3 clicks. one click for every 100 yards. 3 clicks up for 300 yards. this the USMC way. USMC uses yards not meters. the hole 25meter thing is how the army does it. this does NOT mater if A2 or A4,M4 with a DCH on. i never used the big sight when i was in the Marines.
question for the front sight F marked ft post sight and non F marked post sites?
would either one of these make a difference on sighting it with your information??
no
My Z will not line up correctly with the line. It is either one click too far left or one click too far right. Any ideas?
The Z who told about the "Z"? I am a former US Marine we have a complete different way to BZO from the Army. which in my onion is better system. if your interested in the USMC way (proven system) let me know. i will walk you through it. get you shooting out at the 500 with iron sights like we did in the marines.
Ok, but is all this for the 55gr or 62gr bullet?
Good job!
I wish I could get someone to help me understand why I am running out of windage I can get it zeroed my rear sight is all the way left
I understand the procedure, but not the reasoning. Why do you raise the bullet drop compensator to shoot at 25m and lower it for 300m? Doesn't raising it cause you to shoot higher to compensate for bullet drop?
your confusing the front sight to the rear sight
@@shotdog4237 No, I am not.
@Cav Trooper 19D I have since found an answer to this question. I don't know if it is correct, but it satisfies me. From what I understand, the rifle is designed with the barrel pointing slightly up. So the bullet travels in an arc. It rises, levels off, and then drops (like a football pass.) At 25 meters the bullet is still traveling upwards, and that is why aiming center mass at 25m would end up being low at 300 m.
@Cav Trooper 19D Is this Army doctrine? Because this is not USMC doctrine. The M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you
what about barrel length ? does this work with a 20 inch barrel?
the M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you.
This is not true; you can still set the 50-200 & the 100 zero. Look up RIBZ
Any difference with the removable carry handle and 20" barrel?
No. the M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you. Where did you hear this? about 20in is for 8/3? i am hearing this a lot.
The detachable carry handle for M4 and A4 is the same but since the sight radius of these two rifles is different so is the click value: M4 .75 MOA and A4 .5 MOA. Now because the A4 produces a foster trajectory than the M4 it is zeroed at 25 meters at the Z setting rather than at the 6/3 setting and then the elevation wheel is turned back to the 6/3 setting which will yield a 300 meter zero.
WHY IS YOUR WEPON ON FIRE RECRUIT! !
So you have to mechanically zero an AR a2 sight before actually zeroing it in? Sorry I'm a noob at this and confused
okay- there are two separate things going on here. these sights have distance settings marked on the elevation turret. those markings will only be correct if you zero the rifle with the turret on the correct spot and use the FRONT sight to zero your elevation.
If you don’t set the sights in the right place first, you could go to the range and simply click your way to a good zero. but if you do that the distance markings on the sight won’t mean anything.
Why do you need to back the drop comp 2 clicks when you zero it? What does this do?
It compensates for only being 25 meters from the target on a 100 meter zero
@@EN2HAMMSTER ahh ok. Thanks!
@@EN2HAMMSTER it compensates when sighting-in is at 25 meters instead of 32 meters.
thank you! IS there any difference if you have a 20" barrel with the detachable 6/3 drum?
What would a drum change about the sights?
@Cav Trooper 19D so if I have a psa 20 in A2 barrel with A2 detachable sights, when I go zero it should I leave it on the 6/3 or on the Z? HELP!?!?!
@Cav Trooper 19D thanks so much will subscribe right now, one more thing, after zeroing it in ar 25 meters then I return it back to 6/3 or do I leave it at Z , thanks again So much. Sorry for the noob questions
the M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100m .This is USMC doctrine. Marines BZO different at shoot at 36yard not the 25. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you
Great information! But you may want to spit that worm beading out before recording.
Thanks, I was struggling with some health issues at that time but still trying to make good content.
how do you zero this if your shooting less than 100 yards?
Zero at 25 meters and you will be about 3 inches high at 100.
Why are so many of these videos so different. I was told on a 16" barrel put sight on 300-600. do not put on z or up a notch to sight in. on a 20
' Barrel to put on the z. I dont know what is right.
You can get the Army or Marine M16 field manual off amazon for super cheap. It explains all the differences between the variants and answers the question you just asked.
On the 16" barrel adjust your BDC dial (Bullet Drop Compensator) to 3/6 (300/600), and leave it there. Flip your rear peep to the 300 meter aperture (smaller peep) and dial it to center (observe the hash-marks), and leave it there. Flush-up the front sight post base with the front sight housing, and you are set to "mechanical zero." You are now ready to begin your "zeroing process;" you may proceed to the range.
A lot of this info coming out is from Army doctrine.
someone turns around and puts in thier words. Being a former Marine, Marines have a different way of doing things. we had to shoot out to the 500 with A2 "iron sights" The M-16A4 is a flat top with 20in bbl with a detach handle of 6/3. bbl length has nothing to do with 6/3 its due to the dch being higher then the A2 carrying handle A4/M4 6/3 = 1/2 inch for every 100, means for every click on the rear sight is an adjustment of 100 ( ARMY does not teach this I guess?) .This is USMC doctrine. Marines BZO different and shoot at 36 yard not the 25 meters. USMC adjust all rear sights to A2 8/3-3 or A4/M4 6/3-3 different from the Army. if you be interested in the USMC way I will be happy to tell you. Marines dont do this Z crap...lol
@@Sam7x57 Get the USMC
@@esmith3438 .. I've been studying these sights. The 6/3 is the detachable handle with a "Z" index. This is 2 clicks above the 6/3 index and "Z" is used for zeroing the A4 20" barrel at 25M. When zeroing the M4 which is a 14.5" barrel the 6/3 index is to be used. This is Army doctrine and the differences are due to different velocity coming out of the different length barrels. Also, there is a difference in the MOA values between the 8/3 and the 6/3 handle when making modification to the sight wheel for IBZO and RIBZ.
Can I just go out to the range and zero it in there without mechanically doing it?
Yes, & thats what a lot of folks finally do. There are just too many crap companies making products for AR's.
You have to make sure it's a military spec sight for all this to work right. For the BDC to work right.
they dont know about the z or how to fix the a4 carry handel at leapers or gnarly gorilla i just threw my a4 sight away i will never buy another utg
zero at 25 meters
*cough* 36 yards
What? 😐
The USMC way
great video