AR 15 Barrels - Part I: How to Choose Barrel Length, Twist Rate, and Gas System (AR15 / AR-15)
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- Опубліковано 20 тра 2024
- This guide will help you choose an AR 15 barrel for an upgrade or buy for a new build. This video covers barrel length, twist rate, and gas system length. Part 2 covers muzzle device choice, round lethality / range, barrel material, and chambers.
The most common AR-15 barrel lengths are 14.5", 16", 18", and 20". I prefer 18", or 16" for maximum velocity without excessive length or weight. 14.5" barrels have legal concerns and must have a pinned flash hider, compensator, or muzzle break, which I do not recommend. 14.5" guns also don't have enough velocity IMO, especially for 5.56 NATO.
Barrel Twist rates:
1 in 7 (1:7), 1 in 8 (1:8), 1 in 9 (1:9) are all discussed. A shorter twist rate, 1:7 provides the most aggressive twist allowing the heaviest bullets (77 grains) to be effectively stabilized. 1:9 works with 55 and 62 grain bullets, but should go beyond there. 1:8 works with 55-68 and some people use 77 grains. Excessive twist can negatively affect very light bullet accuracy and insufficient twist will not stabilize heavier bullets.
Gas system length.
The three common AR15 gas system lengths are carbine, mid, and rifle length. I do not recommend carbine length gas systems with 5.56 since it provides no real benefit and I find the ergonomics poor. A mid length gas system is best for a 16" barrel since it makes the gun easier to shoot and handle. The longer gas system typically also has a longer handguard, improving ergonomics. For a 18" or 20" barrel gun you want a rifle length gas system. This will be very easy to shoot, provide a very long hand guard gripping surface, and generally be awesome.
*Correction*
I said gas pressures increase over barrel length, which is incorrect. Gas pressures are highest in the chamber and decrease over time/distance. The bullet does still pickup velocity with longer barrels, but the pressure slowly decreases.
However, the advice given still stands. Longer gas systems are often softer shooting and generally regarded as more reliable. I just explained that part really wrong.
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It's the blues clues guy of ar15s
Hahaha, I love it.
Hilarious. Good video but your crack made me laugh all the way through. 🤣🤣🤣🤣🤣🤣
Overall, this was a good video. I would advise against calling something "stupid" or "dumb", particularly if you don't have a full understanding of the why. Gas system length is unrelated to handguard length.
You can use a any length handguard with a carbine, mid, intermediate or rifle length gas system. As you correctly stated, you should ensure that the handguard covers the gas block, or you risk knocking it out of alignment, which will affect the function of the rifle. It's for this reason I'm not a fan of "railed" gas blocks like the one on the DPMS Oracle.
Longer gas systems aren't "more" reliable, they can be less, which is one of the reasons why the military uses a carbine length. Carbine systems are a bit more violent and cause accelerated wear on some parts, particularly on the bolt & gas key.
The reason for the enhanced reliability of a carbine length gas system as opposed to a mid-length gas system is DWELL TIME. This is a function of the amount of barrel left after the bullet passes the gas port. Once the bullet leaves the barrel, the gas pressure drops precipitously, so more barrel after the gas port allows gasses to travel down the gas tube to the bolt carrier. With a mid length gas system, the block is further out, there is less barrel before the bullet exits...and thus less propellant gasses to cycle the bolt.
This does cause less of an impulse making the mid gas system a bit more pleasant to shoot, but let's be honest - the 556 is a soft round anyway.
If your ammo is full powered, you shouldn't have reliability issues with a mid length gas system, but with lower powered ammo like steel case Wolf and Tula, some have had cycling issues. It's a trial and error thing- but life on the line, I want something I don't have to think about, so carbine gas system is better.....NOT DUMB.
Read up on how dwell time effects cycling of the firearm. I'm not knocking you, as I needed to study it quite a bit. Just a little info for you. Keep up the vids!!!
Exactly why we properly tune with adjustable gas blocks to compensate for all these overgassed tube and barrel lengths causing cyclic timing and wear issues.
I appreciate the vid,and your comment,being new to the AR platform,they both helped quite a bit.
I explained gas pressure as the bullet moves down the barrel incorrectly. Please see corrections in the description. Pressure does not rise over time, it decreases. Velocity does increase over time / barrel length, that was correct. Recording and editing while fatigued is not a great idea. Sorry guys.
A longer barrel doesn't "allow gas to build up" behind the bullet. The pressure behind the bullet is at its peak the moment of ignition. Hence why pistol length gas systems cycle so much faster and "harder". A longer barrel does, however, allow the bullet to pick up more speed before leaving the barrel. Once the bullet is in the air it ceases to increase speed because the expansion gasses cant push it anymore. They disperse into the environment.
The rifle length gas system doesn't give you more pressure than a pistol length, it gives you less. Hence they cycle slower and softer, resulting in less felt recoil.
Your observations are correct, but your explanations are backwards.
BOBimus Rex The reason for the longer barrel having a bit more velocity and accuracy, is the twist rate and the longer barrel allows the bullet more time to twist and spin down the rifling. This gives the bullet added velocity and it makes it more accurate. The gas system placement or length in relation to gas port location effects the cycling of the bolt.
David Russell Your mother is a genius.....I’ll bet your a PX Ranger....
Up-a-Creek Well what qualifies me is that I was Army Infantry for 10 years, 2 combat deployments, and for the past 14 years I’ve been in law enforcement and I am the Armorer for my agency’s duty station. I’m certified by Colt and many other gun manufacturers as a Armorer......I’ve been an Armorer for over 10 years, oh....I’m also one of the firearms instructors too.....I’d say that qualifies me to give my opinion.....
Bob is a moron
@@bksa169aguy6 Twist rate has absolutely no impact on velocity.
The spin of the projectile & the forward momentum of the projectile are totally different mechanics.
The velocity difference comes from having a more complete powder burn, thus more gas to act on the forward momentum of the projectile.
Barrel length also has nothing to do with accuracy if all other variables are accounted for.
I am new to the gun field and just purchased an AR-15. This was one of the best well presented videos I have seen. You never talked over my head as a novice and you made things easily understandable. Also, you were definitive in your recommendations, not like so many who tell you all of the options out there and never give a recommendation. You at least recommend and give a starting point direction for people like me. I think I am going to subscribe
Good information, glad to see another quality upload!
Thanks, it's about time my little hiatus ended.
Where did you get the round smooth handguard that was on the rifle at the end of the video
Great info. Trying to plan out a .308 build and this was just the kind of stuff I was looking for. Very comprehensive and informative. Thanks!
+Jason McNamee Glad you liked it. The one thing I'll say for gas system lengths, the other calibers have different pressures and what not. Just be sure to figure out optimal system for your caliber.
I love channels like these that go into things technically glad I found your channel.
Appreciate it. Glad you enjoyed.
Building my first AR, thank you for the very helpful video!
You're welcome. Let me know if you need any help.
great explanation. picked my first AR over black friday and I will build it for sure
Thanks. Good luck with your first build. It's a lot of fun.
If you are looking for the most accurate barrel on the commercial market , then it is the Wilson Combat barrel in any caliber
they sell. I currently I own 5 Wilson barrels in 3 different calibers and they all shoot more accurate than i can hold them , which is typically 1/2" to 3/4" at 100 yards. All Wilson barrels are Match Grade barrels. I have 45 years experience with the AR platform , 22 years of it in the U.S.M.C. and was a member of the Marine Corps rifle team for two years. Warning ! If you buy a Wilson barrel you will never be satisfied with any other brand again.
Remember that at 14 and a 1/2 in the gun is going to be blisteringly loud when it goes off. Even at 16 in you're giving up quite a bit of velocity. 18 to 20 in is Easley handleable for length and functions quite well with 5.56 + 223. Even given the limitations of the 223. I have one firearm in said caliber with less than a 14 inch barrel at least in the functional barrel length. It does have a muzzle brake on it that I can't add all the ports forward on so it didn't hurt literally hurts when it goes off even if you were Outdoors. But that firearm is for very specific Close Quarters tactical work. It is also in the form of a Mini-14 which will continue to function for a long time to come with very little maintenance.
The highest pressure in that firearm is directly in front of the chamber. And no one would put a gas block there. So your thought that you get a higher pressure if you move the gas block down the barrel, is false. It does not work that way.
Great vid!! Very simple and to the point!
Thanks, glad it helped.
One of the most instructional AR videos I have found... GREAT job!
Thank you, I appreciate it.
Nice video. Good general ideas. 👍
I've been looking into building an AR15, most descriptive and helpful video i've seen
Thanks. Good luck on your build.
Great! Thank you for knowledge.
You're welcome.
Thanks for the video! Helped me a lot.
+Adrian L Happy to help.
Nicely done.
Thanks.
Good stuff, I'll have to finally pull my ruger out of the box and hope it has some of the favorable attributes you have mentioned before I start building it.
Thanks, good luck with your build.
Thanks for the informative video, much appreciated. Gained a Sub
Welcome aboard!
Carbine length gas tubes were a mistake born out of bureaucracy. People wanted M4 clones, but were legally bound to 16" barrels. If I could change anything about my AR 15's, I'd have gone mid-length. However, the availability and common knowledge weren't quite there yet. Great Video!
+Renaissance Jack Thank you very much.
Nice video 👍 keep it up!
Thanks!
Great video i learned alot thank you sir
Glad it helped, you're welcome.
Great talk! Thanks.
Steve
Thanks Steve. Now I just gotta finish editing the 2nd part... stupid day job.
very helpful. many thanks.
Happy to help.
Please understand that the majority of aftermarket shorter barrels and gas tubes make your build overgassed and slightly out of time. Not to the point of leaving swipe marks on the case head, but much more gas pressure than required. Using and tuning an adjustable gas block is a requirement for peak reliable operation. Much less force exerted on your locking lugs, faster cyclic rates that actually stay in time, and less felt recoil.
Good content, thanks!!
Appreciate it, you're welcome.
Thanks in confirming my thoughts, f the bull on other comments, much appreciated on your time and knowledge.! Thank you sir
You're very welcome.
I think some people want to teach others to handle the gun as they are doing, handling and stance is not an issue. Different people do it differently as long you are comfortable with it and shooting well.
Thanks Great video!
Appreciate it!
1st off THANK YOU this channel has been incredibly informative!!!
Question: I shoot Air rifles long range so in my transition to firearms I want a gun that can be BOTH a home defense AND a long range rifle.
So is there a way to build out the lower that can be switched out to do both, then I can swap them as needed?!? OR do you recommend going with an 18" and just have it serve both proposes?? I am a bigger guy I can handle the 18" in a home defense situation if need be.
Anyone any help/advice is greatly appreciated. Also I am newer to firearms so specific parts would also be appreciated. As long as it won't ruffle any feathers with your sponsors.
Thank you!!
Depending on how you setup the lower (using a versatile trigger and adjustable stock) you could use two different uppers easily. If you want a general all arounder I lean towards 16" these days. If you want something for more dedicated long range I think building a 20" works.
I have a completely separate 20" rifle because the trigger is very light. With such a light trigger I wouldn't feel comfortable handling it quickly in 3 gun. Again if you use something middle of the road trigger pull wise I think building 1 lower (to start) isn't a bad idea.
I have a 1/9 twist 24" stainless match barrel and it shoots 69gr under 1/2 MOA shoots 53gr the same. 1/9 is probably the best over all twist for the AR 223. 1/12 is good for the 40s but 1/9 will shoot them well too.
It depends on the velocity you shoot them at.
2500 fps 1/9 twist - 2500x12/9x60 = 200,000 rpm
3600 fps 1/9 twist - 3600x12/9x60 = 288,000 rpm (try to stay under 300,000 for varmint)
3600 fps 1/7 twist - 3600x12/7x60 = 370,000 rpm (Blowing up rounds, reducing accuracy, inc heat
Sierra 69gr are perfectly stable in a 1/9 twist unless you were to shoot them under 1600 fps. They shoot around 3000 fps in a 24" well over 200,000 rpm. 1/7 twist really only good for shooting longer bullets (Tracers) since they are not pure lead they weight 62gr but have the length of a 80gr thus 1/7 twist is needed.
Its the the weight of the bullet its the length. Some alloy bullets are much longer than lead. Some 26gr alloy can be longer than a 40gr lead bullet and would require a faster twist.
1/9 can do 36gr to 75 gr. But at 75gr its hit or miss. Over spinning the bullets might be slightly less accurate than say a 1/12 twist and produce a little less barrel heat. If the bullets were all perfectly balance over spinning would not cause any accuracy issues so a 1/12 might be a little more forgiving. Shooting heavy 75+ grain also means more drop and slow best shot with a caliber other than 223 with more case capacity.
For Varmint 223 shooters 1/9 is probably the best do all twist. 36gr to 69gr all sub MOA using a 223 Wyled chamber w bull barrel. 1/7 and 1/8 can do it but at the cost of heat and some velocity and blowing up lighter rounds in mid flight. With 1/9 twist its difficult to over spin as the 223 does not have the case capacity for 4200 fps but with a 1/7 for sure you can blow up varmint rounds.
I thought it was length of the projectile and not the weight that determines twist rate.
You don't have to pin a muzzle device on a 14.5 just build it as a pistol and use a pistol brace
The Smith & Wesson M&P Sport II has a 1/9 Twist Rate and Shoots up to a 69 grain well. Twist Rates and their ability to stabilize different grain weight(s), also comes down to the barrels profile (heavy, pencil, etc) and who makes it (quality level). Sometimes you'll find surprising results that defy documented statistics. Great video. Happy New Year to You and your Family. Cheers!
+Joe Sinegal Thank you. Happy new years to you as well.
You go brother, nerds know our stuff
Haha, thanks.
What buffer, buffer tube, and buffer spring do you use? I'm seen and heard of people have lots of problems with the bolt cycling.
+The Tech Man If you use a standard buffer with a 16 or 18 inch barrel you'll likely be fine. Some people experiment with heavier buffers to optimize buffers, but there may be trial and error. I would Google ar buffer weights compared to fully understand it. There's sort cool cutaways showing the internals.
Essentially a heavier or lighter buffer can be used to adjust bcg timing and offset over gassing.
Good information. Im new and want to build and in Canada due to is being already very limited in use we can build them into whatever except full auto.
Thanks. Good luck with your build, I hop navigating those laws isn't too bad.
Nice video. 👍🏼
Thank you.
You could just register a lower as an SBR withe the NFA for that 14.5 barrel length. Just another option not given in the video. Search sbr nfa process
It is tested fact that some ammo actually looses velocity over 18 inch and even 16 inch on some as well. Under 13 inches, most 5.56 and 223 ammo does not perform as designed due to the velocity needed to cause the boolit to open up as a hollow point or can cause tumble or over penetratration due to falure of the jacket to cause a boolit to open up which turns your AR into a great performing 22 magnum. A 13 inch AR is fine up to about 125-150 yards depending on barrel and ammo used. The U.S.Army went with a barrel length of 14.5 inch with an A2 flash hider as their ideal length field rifle after starting with the 20 inch barrel. For me, a 14.5 with a wielded pinned A2 flash hider, medium contour barrel, bringing the overall length to 16" , 1 in 8 or 1 in 7 twist barrel, has a winning combo of handling, weight, and performance and I can use any stock I like as well as not working about the ATF or state governments deciding to again, restructure language for the “pistol length AR15 laws”, which they can and will do with political pressure.
I didn’t want to leave the impression that longer barrel lengths can cause a loss of velocity, but it has in a few cases.There is an average of 20-24 FPS increase in velocity per inch, but that is between a 16 inch barrel up to a 28 inch barrel. Things begin to change when the barrel is cut to less than 14.5 inches, with un acceptable longer range results out to 250 yards and more. A 10.5 inch barrel is ok for short range work, but 13 is much better.
One also must recognize. 223 is tested with a 24 or 26" for the velocity stamped on the side of the box.
5.56 will reach 3100fps with a 20"
2700ish with 16"
Actually the further a bullet goes down the barrel the less gas pressure you have. A longer barrel does give a larger muzzle velocity because the gas accelerates the bullet for a longer time. You have a fixed amount of powder that will burn into a fixed amount of gas. If this gas is in a smaller volume ( bullet close to the receiver) you get a higher pressure. When the gas is in a larger volume ( bullet near the muzzle) you have a lower pressure. So, when you port the gas system further down the barrel you get a lower pressure. The pressure may be lower but it is still high enough to get the job done.
Really great video and spread of information covered. Could not catch it - did you mention 55gr and 1:7 twist rate?
Thanks. I've used 1:7, 1:8, and 1:9 barrels with 55 grain FMJ BT XM193 with good results. I've heard scattered stories of issues with 55 grain and 1:7, but never experienced it myself.
Depends on your particular gun and the ammo, but I've run numerous 1-7 barrels at 16in and the only 55gr that have ever given me problems were Tula. I've always chalked that up to the crappy bi-metal construction. Anyway, never seen any signs of over-stabilization in 50gr+ projectiles, and one still has the ability to run up to 77gr (or larger). For 16in 1-7 is the way to go. For a 20in, 1-8. 1-9 is pretty antiquated and for a general purpose rifle I'd avoid it as I have had problems with 55gr and 68/77gr not stabilizing in older Bushmasters with 1-9 twist.
@@mfallen4277 This is a very helpful response, thanks. It can be a bit confusing because there is so much information out there. Most rifles I have seen in 16" have been either 1:7 or 1:8 twist. Thanks!
Thanks for the vid, I was a little worried about buying an 18" barrel cuz im only 5'8 and i thought it might be too big.
I probably wouldn't go longer, but I think you'll be a ok at that height.
No, don't worry it'll be just fine and I just mounted a 30" BCB Wylder .223 barrel which weighs almost as much as the original ArmaLite AR-15 did.
I have a smith and Wesson M&p 15t with a 16 barrel but it doesn’t have a brake on the barrel do I have to buy another barrel or can I mount a brake on it ??
If the barrel has threads on it you should be good to go. Threads would be under a cap or an existing muzzle device. If it's just straight metal to the end you might as we replace the barrel.
Unless you have a good local shop the cost to thread an existing barrel is relatively high once you factor in shipping.
good video. what was that crud at the base of your brake on the close up view?
oops...I spoke too soon. you explained it was braised.
+mixflip No problem. If you were better at it you could silver solder it without googber-ing it up. Either way, in retrospect it was a dumb idea. You perform a big poorly controlled heat treatment in order to do that, which could affect metallurgical properties. I did it because of state law reasons.
Good afternoon Sir and folks; I’m currently making my build and I am stuck between RRA (18 inch, .223 wylde mid length Upper) or Aero Upper ( 18 inch, .223 wylde Riffle length upper). I am familiar with riffle length gas system at .223 wylde but I am not familiar with a 18 inch .223 wylde mid length gas system. What are your thoughts and any one out there that has experience with either or? Outstanding Video !!Thank you.
I haven't used a wylde mid myself, but the chamber won't affect the rifle's function. I guess decide between a little more velocity with 20 or handling with 18?
I'm building a 16" Rock River Arms Operator II. I am absolutely swapping the hand guard and sling mount location. Probably snag a good bipod and a variable scope.
+mje19D One of the great things about ARs is the ability to do almost anything!
Great video! One question... what scope are you using on your 20” Monster? Looking to upgrade to a better long range scope. Thank you!
+Kenneth Odum I'll look at the model if I can when I get home. It's a 3-9x or 3-10x in the $300 to $400 range.
Compulsion84 thank you! That’s the price range I’m looking for too
+Kenneth Odum Weaver 3-10x 1/10 mil with 30mm tube. Pretty good clarity, loses a little light. I would look at scopes in store, figure out what reticle you like, and also check out Vortex. They might be my favorite mid range scope company. Leupold is nice too, but get expensive quick.
I highly recommend 30mm tubes for more light.
Shoot the mil spec gun. It’s been worked out for all considerations. The A4 is best for a multitude of reasons: better velocity, better sight alignment, and better shooting from prone position.
Around the 9 minute mark you said to get a mid length gas system for the 16inch barrel. What do you define as mid length?
It's a standard. You don't need mid length x". You would just look for a 16" or 18" mid length barrel.
Im new to the AR platform, i got a 5.56 16in with a 1/8 twist, id love to get a long range ar so im asking around for some tips and suggestions. maybe you might have some?
+kris Matthews Free float for sure. 20 barrel is probably the way to go. Heavier profile barrel. Manufacturer is a big debate. If you're going high end you're probably going 350 or $500. You can get a stock with nicer adjustments to improve ergonomics and stability.
A good trigger is really important. I have a 2 stage adjustable Geissele that I love, 2nd stage breaks at around a pound I believe. I love it.
cool thanks
I have spikes 16in 1:9 looking for some good reloading vids and any idea with help with building some pillls
Make sure you lube the case necks on 223. I got several stuck in die from inadequate lubrication. PITA.
Great video buddy, helped me a lot.
Glad to help.
Thinking about a Wilson Combat Recon ,fluted 18inch ,I/8 twist, not sure what I need for a gas block and tube.
+stang3331 ooh nice. Gas blocks are fairly generic unless you want to adjust it to tune or bc of a suppressor. Tubes are tubes. I just buy stuff with decent reviews, but they're pretty much all the same.
Carbine gas systems don’t clog up after prolonged use. The gas block and gas tube get hotter than mid length, which clears them out. Also the higher pressure helps them operate in adverse conditions. So if you’re fighting with your rifle outdoors, or shooting long strings of fire, a carbine system will go bang more before you start to have malfunctions. Probably why the military uses them.
Also, a 14.5 barrel is easy to pin and weld, then remove and pin and weld again if you need to. The loss in velocity is minimal and it’s a lot more maneuverable. Probably why the military uses 14.5.
Yes, if you’re opposed to a little extra work/cost to pin and weld your barrel than go with the pointless 16” (this rifle was never designed for 16”). Yes, if you are never planning to run your rifle dirty, or put reliability before comfort, go with a mid length gas system. To say neither is useful is wrong.
More reliable to what extent? Sure it has more gas for reliability though that will erode the gas port faster wear out the tube faster beat up the action faster.
If you have seen any meltdowns it's always the tube that fails. Shorter closer to the action. Is going to fail sooner.
Hello, i'm new to building an AR and i just ordered a 16" carbine length barrel 1:8 twist and along with it i also picked up a carbine length gas tube with low profile gas block. . . did i order the right match? thank you in advance.
Ian Aguinaldo yeah you’ll be fine, the most popular that I see is usually the 14.5 w/carbine tho.
@@AyeMcCloud thank you so much for that and answering my question so quick. Have a good one.
Based on what you said, that should all fit up well.
I have a 5.56 ar15 and I’m looking for a 223 wylde barrel right now and was wondering if I should go with a 1:9 twist rate if I’m looking to only shoot 55grain ammo with the most accuracy
IMO that would be perfectly fine. 1:9 is very accurate with 55 grain bullets.
Soo hows that .223 barrel with 5.56 rounds going through it? Lol
Nice Vault-Tec lunchbox
☝️ this guy gets it.
So a 16 inch barrel with 1-8 twist with a mid system gasblock and a 15inch hand guard is good?
I'd say it is. You could even get a little shorter handguard if you want.
Not many have heard of pistols an rifles but at least theyve heard of 'guns'
what barrel and upper do you have on your long range 20 inch setup ?
It's nothing fancy. It's a YHM medium weight barrel with a small amount of diamond "fluting". I believe it's 1 in 9". I intend to replace it with something nicer, but it's low on my priority list.
Would the bullet reach further with a 18" barrel on 5.56? Or would you have to have a bigger bullet?
A longer barrel will have reach slightly further / drop less.
Why does the handguard need to be tied to the gas system? Can't you have a really long handguard on a shortlength gas system? Granted short gas system is really bad idea for 16 inch barrel.
You don't necessarily have to, it's just a better fit. You could have a longer handguard than the gas system, it shouldn't hurt anything. It's also possible to have the guard not cover the gas block, but I hate those myself.
Does it matter what length your guard rail is when it comes to your gas tube?
You mean your hand guard? It won't affect function but I recommend covering the gas tube.
I call mine AT&T... Incase I need to reach out and touch someone. Lol
I just wanna know what brand your handguard is
It's AP Customs, but they went out of business or something. There are other similar companies it you look for carbon fiber handguards.
I figured it was, because I have the same kind but wasn't sure the brand. I bought it from a friend and he mentioned that there was rail pieces I could buy, but I hadn't found any. Desperately need to mount my front flip up sight.
possibly my last AR upper ... is 24 inch 223 wydle
Ooh that is a big boy. I'm trying to buy a criterion 223 Wylde right now but their backorder list is insane.
I have a Windham Weaponry VEX. It has a heavy 20in SS fluted bull barrel. This rifle is really accurate way more accurate than I need. I don't even hunt,but I may have to start if this inflation doesn't let up. 😆 I don't really know what I'd hunt with it cuz you can't hunt deer with anything less than a 6mm bullet in my state. I guess I could hunt deer with my 9mm Ruger American pistol. 🤣
18 inch 1-7 twist rifle length gas system. Aka a Daniel defense ddm4 v11 pro
That looks like a nice rifle. I wish they would've gone with M LOK vs keymod though.
@@Compulsion84 the v7 pro has mlock
What kind of hand guard is on your long range rifle
It's a YHM quad rail. It came on the gun, I believe it is mod length. It is heavy as hell. If I were to buy again I could go M lock.
Yeah, good vid. You are well spoken.Thank you.
You're welcome. Let me know if there's any topics you want to see. If I know about it, I'll try to do a video.
I like this dude LOL 'that's just stupid' I totally get it!
Haha thanks. Glad you like my nonsense.
Towards the end of your video, you accidentally lied to all of your followers, and generally hold this inconsistency. The pressures are HIGHEST closer to the chamber, because there is the same volume of gas contained in a smaller space, which is why pistol length gas systems are typically more reliable and have harsher recoil than rifle or mod length. I might not explain it well, but the closer to the explosion, the more reliable the system, in short words. Please look it up or ask your gun smith about it, I have a degree in chemistry and biology, so not sure exactly how to explain it in ballistic terms. I usually try to run the shortest gas system possible because they're going to be more reliable.
Yeah you're right. I screwed that part up. The recommendation stands since longer gas systems are typically more reliable (and not over gassed like shorter ones sometimes are), but the mechanics explained were wrong.
What I meant to say was the pressure pushed the bullet for longer giving you more velocity. The pressure decreases over time, but pushes the bullet for longer. Port size and dwell time would've been the right things to go into, but I digress.
Mid length is most reliable
soldiersystems.net/2018/05/14/nswc-crane-carbine-mid-length-gas-system-testing-shows-increased-performance/
In all my research, I've always saw that longer gas systems are more reliable than shorter. Pistol length is actually the least reliable. I think you got it backwards. Just a tip.
“More reliable”, I’m not sure about that, but it will definitely be the dirtiest. Lol
"My chamber wasn't fully closed." Is that like saying "My zipper was still open?" I like that.
😂
That was actually quite bad, he showed the rifle was safety checked, poor job and bad example of safety
Did you flow nitrogen when you brazed?
No, I did it fairly shodily. I would like not do it again, likely just pin.
is it still accurate if you shoot 55gr to a 1~8 twist?
Very accurate
@@Compulsion84 in your experience sir, how long would you think a stainless barrel lasts? im not a competitive shooter and i dont usually shoot auto except in cqb operations.. and casual fun fires at the range.. just about 30 rounds of auto..
@@Compulsion84 so this would also mean i can be very accurate shooting 55gr and 62gr green tips in a 1~8 twist?
A thinner barrel I would argue that it would cool faster bringing you back to cold bore accuracy sooner. More mass holds more heat longer.
Shadowlogic420 you would be Wrong. Clearly thermodynamics isn't your thing. Think about boiling a pot of water , alarger pot ( more volume) takes longer to heat up & tends to cool faster due to larger surface area.
Terry C. Snyder you're obviously not taking into consideration convection currents that cool it faster metal is Nothing like water.
Shadowlogic420 LOL, You've no idea what you're talking about . too muck weed & video games ?
Terry C. Snyder I do see your point though. If you're relying strictly on air to cool something more surface area wouldn't hurt. Most of the guys I shoot with use fluted barrels. I've just got a pencil barrel and it does it's job, and is lighter than theirs.
Terry C. Snyder i haven't smoked pot in like 8 or 10 years which was around the same time I made this account name and all the other ones I tried were taken. If you want to base it off of face value that's your prerogative
What would you recommend if I want to hog hunt and have a range gun
I’m stuck between a 16 and 18
I don’t wanna buy one and then regret it later
+SnOwCoNe27 To preface this, I haven't hog hunted and don't know much about it.
I image you want something shorter to make it easier to handle especially moving around or clearing vehicles or obstructions.
If you are around 100 to 150 yards max I would personally get a 16" mid length gas system, 1:7 or 1:8 to stabilize heavy hunting bullets. Grab a collapsible stock and a short muzzle brake or compensator. There are some short comps out there that barely add any length to the gun.
I'll probably throw a red dot or 1-4 or 1-6x scope on it.
Again this is hypothetical cause I haven't hog hunted, just trying to visualize what you would be doing.
Compulsion84 you explained it pretty well
Yea the hunting would be close range but I like the idea of shooting targets far away. I’m a pretty big guy so I wasn’t too concerned about the 2 inches but good intel
Thanks
My main concern was handle ability / it being cumbersome, especially clearing an ATV, vehicle ETC. Does 5.56mm have enough stopping power for hog hunting?
Compulsion84 yes sir
@@Compulsion84 8
You're totally missing the points behind the different gas tube lengths. The reasons you mention don't have a lot to do with it.
Will you make us a video and explain it better?
what is that handguard that looks like cylindrical carbon fiber?
+sneakatdatavibe It is carbon fiber. Made by Carbon Arms (I think). They don't seem to be around anymore, but several companies sell carbon fiber handguards. I shaved off roughly half a pound vs aluminum handguard with that.
how about a mid length gas system on an 18" barrel?
Those are totally fine. Having a rifle length gas system is a nicety, but not a requirement.
@@Compulsion84 thank you!
@@Compulsion84 do you have a video on carbine buffers (car, H1, H2, etc. )? i like the way you explain things , and that would be helpful.
I don't. There's some helpful guides online. I don't know the match ups by heart.
I love to see a nerd that's into guns !
Haha, gotta stay diversified!
7:52 wow
"chamber" those eyes though
Profile of barrel???
Good info....lose the music. There's absolutely no need for it
I appreciate the feedback, you think the music is distracting? Some people like it to jazz it up a little, trying to find a happy medium.
Music can be good, but not all the time. If you look at some of the larger and more successful channels, the often cut in less distracting background music over certain shots, but generally not when someone is giving a detailed verbal explanation. You give some pretty good info, and some minor production tweaks might help your subscribers
I like the music
Its difficult to pick up your words for the music, very disturbing.
Compulsion84 I do agree with jodo 1971 and with the next guy. But in a situation where we are listening to detailed words and not so much pictures no music is better. In my opinion of course. I'm into the ar15s myself ,and I have to say it was a pretty informative video. Thank you for sharing your knowledge.
pistol under 16" with the right "brace not butstock"
Short barrel is for close quarters home defense.......pretty simple concept.
Terminology- twist rate spin stabilizes the bullets. 1 in 12 is faster and 1 in 7 slower spin rate. A model to show people is a bolt with a nut in it. Thanks for making the vid.
One revolution in a seven inch distance is now a slower twist than one revolution in a twelve inch distance. Uh, ok.
Faster rifling twist rates are for LIGHTER grain bullets. It helps stabilize them in flight. Larger bullet guns, like .50 cal, will always have slower twist rifles barrels. We're talking 1:7 for a 55 grain 5.56mm versus a 1:20 for a .50 cal for example.
That's just not true.
The weight of the projectile isn't what matters, it's the length of the projectile that matters ( they usually correlate in the same caliber).
There are several other variables that anyone reading this can research if they're interested, but the common misconception about weight needs to be corrected.
The new 8.6 Blackout has a 1:3 Twist for a 350 grain projectile just for an example of extremes.
Great video THANK YOU
Thanks! I swear I'll finish part 2 soon.
Weight has nothing to do with it. It is the length of the bullet that makes you need the 1/7.
If your a smaller guy like me a canine length is perfect. Keep your ammo dry
You have twist backwards.... slow twist is for larger weight... faster is for your lighter bullets...
OOooh shit Final Fantasy in the house!
Haha, yep gotta appreciate the games that are now becoming classics .
Auron figurine in the back, I'm listening
Haha, this guy knows what's up.
@@Compulsion84 Hi, I have a BCM Recce 14.5", chambered in 5.56 with 1-7 twist rate barrel. Unfortunately I can't shoot 5.56 ammo here in Italy, so I have to use .223 rem. What do you think is the best .223 ammo I can chose for my AR ? Thank you!
What is the big deal with 14.5 barrels???
I don't like them due to the ATF length / pinning requirements and relatively low velocity.
How much lower with a 1.5" difference can it be? Can't be much
Farther vs further
How about burn rate.
+Darrell Broome What do you mean? That powder dependent if you hand load.
Just got my first one....18" barrel....
Nice, I'm sure you'll have fun with it.