von Weizhacker such an amazing combination of malfunctions, thumb breaking charging handles, optic breaking rails, and much more violent recoil then needed.
Something I find really interesting and engaging about Karl’s delivery is his pace. Some presenters are really rushed and high energy, some are really sloooooow and laid back. Karl has the speed of the rush, but in a really consistent tone that gets the viewer all the way through the material at a good pace without feeling rushed, dragged out, or kurt. It’s a very unique style on youtube and I find it fits very well to the content.
Yep, regardless of subject matter certain presentation styles work better than others, personally i find the high energy rapid cut style to be annoying and sometimes hard to follow (a bit like a Michael Bey movie lol), i also enjoy it when the creators personality comes through and you can tell when someone is faking things. Big thumbs up to Karl for style, professionalism and personality.
He doesn't pause, fill space with "uh"s or "uhm"s; he's clear, concise, and effective even with what appears to be a (very slight) lateral lisp. It's honestly impressive and refreshing.
sure - speed doesn't feel like you're waiting for the next sentence or segment, but there's also enough spacing to process everything before the next thing. i call this "knows how to make a presentation / be a speaker".
Could. Not. Agree. More. It works extremely well in the (IMO hugely underrated) OWV historical series. Nothing feels overly rehearsed and is frequently delivered whilst moving (sometimes backwards - try it, it’s actually surprisingly awkward!) and/or gesturing to relevant landmarks/nearby ruins.
Oh mighty algorithm! Please accept my like and this comment as my tribute on behalf of In Range TV. Bless them with your algorithmic glory and bestow upon them many eyes and click so that they may grow.
Karl has such a super clear and concise way of speaking that I could listen to him y’all about organic chemistry without getting bored, and actually understand it. Really fantastic presenter and teacher.
I've been into guns for a few years now and never actually knew how the piston driven ar15 differed from the direct impingement (mine is a regular direct impingement M16 copy). This is fascinating to see.
4:31 *"Whether it was a little short or not"* My man! I look for short videos! The fact that you were able to explain something in less time than most people shows how well you actually understand the concept. This video gets a like from me. *"If you cant explain it simply, you don't understand it well enough"*
I love shooting my scar17s! Whether it’s Steel or brass ammo. On hot summer days or cold rainy days it hasn’t let me down. I can’t wait to put a short barrel on it. Cheers from California!
That SCAR looked like it was getting REALLY hot in the block and barrel compared to the Brownells. I would love to see a burnout video like the do over at Iraqveteran8888. The effects of high round counts in a short time. Because let's be honest here. The AR15 if properly lubed, not doing that glove dry myth, will function just fine with 800rnds worth of blowback across the bolt. Cleaning happens between engagements whether its an AR or an AK.
brainplay He did a video about a short-stroke gun, a HK416 i think, and the round count was pretty much the same as with an AR-15, but the handguard didn't got as hot since there is no gas tube running through it.
@@davidresetarits5616 Where did it fail? I figured the heat would be caught up in the gas block and the gas aperture would probably erode quickly or the block would fail. That's just a lot of heat in one area instead of dispersed across the longer area.
I would be interested to see more footage like this, it would be very interesting to see the effects of thermals on other systems as well, such as Blowback systems.
2:36 main reason they switched the charging handle to the rear was mainly from the artic testing grounds. Due to wearing big gloves in cold conditions, the guys testing out the AR rifles found it difficult to get at the charging handle. Hence, why you find the charging handle on the back of the upper receiver on AR rifles today and not on top of the upper anymore. This can be found in the Eugene Stoner interviews here on YT and he explains exactly that.
Unintended comparison, but in the side by side shooting, you can clearly see the ergonomics and recoil mitigation implemented in the Scar platform. The sights on the Ar10 are bouncing considerably more than the Scar. It looks like the difference between shooting 7.62x39 Vs 7.62 NATO. Really makes me want to buy a Scar in the future
@KillgoreES From what I understand, the whole SCAR program came about when SF were experiencing issues with their Colt rifles under combat conditions in the Stan, i.e. bolt breaking, barrels overheating. Once Colt addressed and corrected those issues, the SCAR seemed mute.
The thermal camera footage is very well done, and helps to clearly illustrate the points being made. And i agree, Karl's delivery is always excellent, clear and concise. Keep up the great work!
Thanks for the interesting video, it’s always neat so see the information visually. I’m seeing noticeable difference in fouling between my AR-15 and BRN-180S. The piston gun’s bolt and carrier are cleaner at 500 rounds than the semi-DI‘s at 50.
Piston guns also keep the bolts and carriers cooler during use, theoretically increasing service life of the action components. On a side note: does the handguard on the BRN-180S heat up noticeably during fire? I am interested in them, but I am leery of the m lok handguard they have on it.
As a left-hander, I prefer pistons over DI because the gas is bled off further from my face. This might not seem like such a problem for most but unless you're able to shoot in a dynamic environment like 2GAC, a gas cloud builds up in your face even in outdoor ranges.
Iirc, they did a video in the WWSD series on a wandering zero on using a pencil barrel. Something about a hot barrel going flaccid, if not not built correctly
@@CULatte You are correct sir. Modern, properly heat treated pencil barrels are just fine. Older, improperly heat treated pencil barrels went lipdick and gave wandering zeros. The verdict was that high quality, modern pencil barrels are just as good as heavier barrels, but only if properly heat treated. Crap pencil barrels are to be avoided.
No. Even though there is more heat being distributed to the bolt carrier in an AR, the parts don’t get anywhere near hot enough to damage anything or cause any functional disadvantage. In fact the actual advantages of the AR’s gas system (less parts, lighter weight, smoother recoil impulse) far outweigh any perceived advantages of a short-stroke piston system.
So basically, barrels get hot on piston systems. Barrels, bolt carrier's, and gas tubes get hot on an AR (whatever you want to call that gas system). So both of them get hot in the area where you hold them, but the AR has a second hot thing that runs the full length of the handguards and is closer to the hand than the barrel.
@@InrangeTv I'm just looking at the footage. Both barrels were hot. Both gas blocks were hot. The AR gas tube and bolt carrier were hot. So both were hot in the same places, and the AR was hot in some extra places. What am I missing? Was the AR less hot at the barrel?
I do wonder if the less bolt heat advantage is why the M27 IAR got accepted as the USMC SAW instead of other entries. Alternatively, one of the other entries, SCAR HAMR, also operate on a short stroke piston, perhaps there was a flaw in the SCAR design that didn't made it favorable compared to HK's bid?
The HK has the advantage is that the controls are the same as the standard issued rifle. No difference in the manual of arms so every one in the squad can use it with very little training. That additional training for the SCAR can add up in costs really quickly.
saw a great video to illustrate this point years ago with some piston ar15 style rifle, dumped 3 mags on full auto, dropped the last mag and immediately opened it up and pulled the bcg out and held it with bare hands (no video cuts, was holding the bolt less than 8 seconds after the last shot fired), then challenged the video host (i think it was an old tv show) to do the same with his DI gun
Can you do the same with a G3. During my military service in Sweden -89 I was equipped with a G3. I pretty much burned my hands after 3 "mag dumps" The whole damn gun was red hot. I really take a G3 in front of every other M16 / AK5 (FN?) really like that weapon!
It’s interesting to think about the triad offs of these two systems along with others, whether it be reliably over extended firing or accuracy over longer durations or fire. I,as a viewer would love to see a comparison of the accuracy over sustained fire and as a result of that test see the reliability of these two systems. The way they disperse heat is an engineering marvel and an intentional decision..... but who will win????????
Do more action types please. Different handguard materials and designs. Heat molestation is really a thing when you shoot a lot. This could get interesting
Another point of note is the balance between the two systems. It’s not as pronounced with a rifle designed from the start to be a piston gun but on ‘converted’ ARs like the T91 the change in balance towards the front is majorly noticeable and it takes me a while to compensate when going from a 14.5 AR to my T91 clone.
No it doesn't belong in a museum because like the other guy said it's cheaper than a short stroke piston It's called you have a soldier who has the best thing ever created and that is discipline who is going to clean his rifle no matter what and last time I checked an H&k 416 based M27 costs $1,700 worried direct impingement M4A1 runs between $700 and $800 We've been using the AR-15 family since the 1960s we haven't encountered any major problems because of the gas system it works so why get rid of the weapon?
Very interesting video. It seems like the heat is "spread out" more in the DI gun. Like no one spot gets as hot as the piston area in the short stroke gun. I would have been interesting to see what the temps were in the hottest areas of both guns. Keep up the good work in range.
Obviously there's a finite amount of heat generated in each round fired, regardless of which gun fires it. Seems like the DI spreads that heat around a little more evenly while the piston concentrates it. I wonder if this would mean that the zero or group size would wander more on the piston as the barrel just heats up more and more compared to the DI that could fire more rounds before the barrel would be as hot as on the piston gun.
DI tube delivers exhaust gas to bolt carrier group which makes it dirty (carbon buildup). What is interesting - Eugene Stoner switched to short-stroke gas piston system after AR-15 - in AR-16, AR-18 and Stoner 63
Interesting video. Confirming what I allready knew/assumed. Since the video is about the advantages and disadvantages of semi-DI vs. short stroke: what are the differences slash advantages and disadvantages of long- vs. short stroke? I'm guessing the short stroke can be made a bit lighter, but I don't know if the weight saving is significant.
It's significant by reducing the bolt mass that needs to be slowed down when the cycling stroke is bottoming out. A heavier bolt bottoming out on it's return spring means that the recoil impulse will be felt with a pronounced "peak".
The difference is probably with LS you have more mass kicking back, compared to SS, but LS is more crude/reliable and doesn't really care if you're shooting proper ammo or some ammo-shaped peace of shit. So again, compromises.
Long strokes are always harder to control on full auto because of the larger mass moving through the weapon, but long strokes have the advantage of less parts overall. However, I really don’t think short stroke is at a disadvantage because of one or two extra parts in the gas system.
A question that struck me as I watched the final comparison is if either system cools down faster or if that's just a mater of the materials ability to radiate heat. You'd think more surface area would allow better cooling but theory isn't always practical.
I have both kinds of ARs. I have the Sig 716 and 2 516 piston and number if DI ARs. The biggest advantage of piston guns is there's no need to clean the BCG. You can run a massive amount of rounds through them and they are still clean. They do run much cooler also. Like when the man from HK dumped a 100 drum, broke the gun down and grabbed the BCG in his hand held it and said, "just try that with your DI gun" Then there's the price point, piston gun have a high price tag.
i though the scar was a long stroke gas piston system. what about long stroke vs short stroke? which one will get hotter. akm vs vz58 for example. or svd vs romanian
Could you please film a series of thermal videos with different types of AK/handguard setups? I have owned a few AKs and one recurring problem seems to be just how hot they get from shooting. A lot of the handguards that I used have not been up to the task of keeping all that heat away from my hands.
Roadrunner makes an appearance above Karls right shoulder @ 1:18 (edit - corrected spelling on Karls name)
Wile E. Coyote cannot be far behind.
It's Carl with a K
Nice catch. Might be a Quayle though.
Beep! beep!
@@danielkaczynski9702 actually he'd be waaaay behind. Road Runner got Carl as a bodyguard
RIP H&K SCAR-17. You will be missed.
It was amazing! Such a great combination of engineering and beauty will most likely never be seen again. Sad.
von Weizhacker such an amazing combination of malfunctions, thumb breaking charging handles, optic breaking rails, and much more violent recoil then needed.
You mean FN, right? Or is there a joke I'm not getting?
The first up load of the video had HK SCAR-17 in the thumbnail. They have since corrected it.
@@christopherdean9684 I thought that one is only suppossed to say nice things about the dead.
Something I find really interesting and engaging about Karl’s delivery is his pace. Some presenters are really rushed and high energy, some are really sloooooow and laid back.
Karl has the speed of the rush, but in a really consistent tone that gets the viewer all the way through the material at a good pace without feeling rushed, dragged out, or kurt. It’s a very unique style on youtube and I find it fits very well to the content.
Yep, regardless of subject matter certain presentation styles work better than others, personally i find the high energy rapid cut style to be annoying and sometimes hard to follow (a bit like a Michael Bey movie lol), i also enjoy it when the creators personality comes through and you can tell when someone is faking things. Big thumbs up to Karl for style, professionalism and personality.
He doesn't pause, fill space with "uh"s or "uhm"s; he's clear, concise, and effective even with what appears to be a (very slight) lateral lisp. It's honestly impressive and refreshing.
sure - speed doesn't feel like you're waiting for the next sentence or segment, but there's also enough spacing to process everything before the next thing.
i call this "knows how to make a presentation / be a speaker".
That is a very good point. He's well articulated, but quick. And he's easy to understand. Like, technically well spoken.
Could. Not. Agree. More. It works extremely well in the (IMO hugely underrated) OWV historical series. Nothing feels overly rehearsed and is frequently delivered whilst moving (sometimes backwards - try it, it’s actually surprisingly awkward!) and/or gesturing to relevant landmarks/nearby ruins.
Oh mighty algorithm! Please accept my like and this comment as my tribute on behalf of In Range TV. Bless them with your algorithmic glory and bestow upon them many eyes and click so that they may grow.
👍🏼👍🏼👍🏼
Cool to see a roadrunner over his right shoulder at 1:17.
Hmmm, I would have said quail....
@@RobinRobertsesq maybe an anorexic turkey?
@@thaBurninator their natural range is limited to Scottsdale
Its a quail. too fat to be roadrunner but perfect for quail. also the thing above the head is a quail only thing.
Meep Meep
Dont mind me, just here to boost the metrics
DeepCFisherman Same man, just here for the algorithm.
Mood
How dare you.
White is hot and dark is not. Praise be.
It's supposed to be free world don't you know!
Karl has such a super clear and concise way of speaking that I could listen to him y’all about organic chemistry without getting bored, and actually understand it. Really fantastic presenter and teacher.
Enjoyed, learned, as always. Thanks, Karl!!
Glad to hear it!
@@InrangeTv This was so good good I had to see it twice twice! Science! Karl, Thank you!!
I've been into guns for a few years now and never actually knew how the piston driven ar15 differed from the direct impingement (mine is a regular direct impingement M16 copy). This is fascinating to see.
Nice. Now how about thermal analysis of AK vs SKS vs VZ58?
Yes, please.
theyre all piston driven, so would look the same as the SCAR
Original video was flagged by HK because you knew tooo much.
I thought it was because neither of those rifles is a H&K.
@@glandhound They're afraid someone will try it with the G36.
4:31 *"Whether it was a little short or not"* My man! I look for short videos! The fact that you were able to explain something in less time than most people shows how well you actually understand the concept. This video gets a like from me.
*"If you cant explain it simply, you don't understand it well enough"*
This is cool, just having this stuff explained doesnt allways help but actually seeing it leaves an impression
I love shooting my scar17s! Whether it’s Steel or brass ammo. On hot summer days or cold rainy days it hasn’t let me down. I can’t wait to put a short barrel on it.
Cheers from California!
209, yeah Galt! Woot-Woot!
CHUG 213 Cheers from the 209 brother!
Glad it's back up
This was something I'd been told about the two systems, but seeing it happen is always better. Thanks!
Cool Footage! I'm guessing the middle of the Scar Upper is heating up because it's where the barrel bolts to the receiver and the 6-o'clock rail.
That SCAR looked like it was getting REALLY hot in the block and barrel compared to the Brownells. I would love to see a burnout video like the do over at Iraqveteran8888. The effects of high round counts in a short time. Because let's be honest here. The AR15 if properly lubed, not doing that glove dry myth, will function just fine with 800rnds worth of blowback across the bolt. Cleaning happens between engagements whether its an AR or an AK.
brainplay He did a video about a short-stroke gun, a HK416 i think, and the round count was pretty much the same as with an AR-15, but the handguard didn't got as hot since there is no gas tube running through it.
@@davidresetarits5616 Where did it fail? I figured the heat would be caught up in the gas block and the gas aperture would probably erode quickly or the block would fail. That's just a lot of heat in one area instead of dispersed across the longer area.
You had better hope that cleaning happens lol
Karl: Shows thermal imagery of rifles in action
Commenters: OMG there's a bird!
Yeah...:(
Where? I watch the video again after reading your comment
@@AlexSDU 1:17
@@thekraken1173 I saw it. Thanks for the time stamp.
@@AlexSDU It was 3 years late but glad you saw it.
I would be interested to see more footage like this, it would be very interesting to see the effects of thermals on other systems as well, such as Blowback systems.
This is a great visual experiment of what actually applies to something you hold. Thanks man 🤙🤙
Didn't I watch this already or is there a rip in the matrix.
@@itsfyeo1520 It said H&K SCAR instead of FN
Rip in the matrix...I saw this a week after you did.
2:36 main reason they switched the charging handle to the rear was mainly from the artic testing grounds. Due to wearing big gloves in cold conditions, the guys testing out the AR rifles found it difficult to get at the charging handle. Hence, why you find the charging handle on the back of the upper receiver on AR rifles today and not on top of the upper anymore.
This can be found in the Eugene Stoner interviews here on YT and he explains exactly that.
Can you do a video like this on sub guns for the difference in open bolt vs closed bolt. And blow back vs other( radially delayed maybe)
Unintended comparison, but in the side by side shooting, you can clearly see the ergonomics and recoil mitigation implemented in the Scar platform. The sights on the Ar10 are bouncing considerably more than the Scar. It looks like the difference between shooting 7.62x39 Vs 7.62 NATO. Really makes me want to buy a Scar in the future
The Ar10 platform is better.
No....no... that’s not true, that’s impossible!
@KillgoreES From what I understand, the whole SCAR program came about when SF were experiencing issues with their Colt rifles under combat conditions in the Stan, i.e. bolt breaking, barrels overheating. Once Colt addressed and corrected those issues, the SCAR seemed mute.
The ar system no likey the sandbox
I'd love to see a follow on, suppressing both systems to see what the effects would be. Great vid, thanks!
The thermal camera footage is very well done, and helps to clearly illustrate the points being made. And i agree, Karl's delivery is always excellent, clear and concise. Keep up the great work!
That was exceptional YT video. Thank you..
I've fired both an AK and a 7.62x39 AR before.
There really is a difference in performance. With the 7.62x39 AR being easier to control.
Nothing wrong with a short video, especially not when it is as educational and informative as this one.
Thanks for the interesting video, it’s always neat so see the information visually. I’m seeing noticeable difference in fouling between my AR-15 and BRN-180S. The piston gun’s bolt and carrier are cleaner at 500 rounds than the semi-DI‘s at 50.
Piston guns also keep the bolts and carriers cooler during use, theoretically increasing service life of the action components.
On a side note: does the handguard on the BRN-180S heat up noticeably during fire? I am interested in them, but I am leery of the m lok handguard they have on it.
As a left-hander, I prefer pistons over DI because the gas is bled off further from my face. This might not seem like such a problem for most but unless you're able to shoot in a dynamic environment like 2GAC, a gas cloud builds up in your face even in outdoor ranges.
Guys who run cans know exactly what you mean
Thank you for this breakdown 🙏
Neat to see the roadrunner enter the scene just over Carl's right shoulder! (your left side of screen) at timestamp 1:16
Great short video, answers my questions. Thanks
Thank you for the 7.62x51 information
Thank you Karl, again a quality presentation, using the KISS system.
Perfect video! Thank you for all your efforts! Great education, great stance on all the things! 100% top notch and good form, sir
love these guys
Last time I was this early, HK was still making SCAR-17's! :D
Jokes aside: interesting video, *did* watch again :)
Does the difference in heat dissipation characteristics between the two systems has any implications in reliability over extended use in hot climates?
Iirc, they did a video in the WWSD series on a wandering zero on using a pencil barrel. Something about a hot barrel going flaccid, if not not built correctly
Using binary triggers I have seen that to be a factor. I only do that in 5.56 so my experience is limited
Hot climates no. But it can be an issue in sustained fire.
@@CULatte You are correct sir. Modern, properly heat treated pencil barrels are just fine. Older, improperly heat treated pencil barrels went lipdick and gave wandering zeros. The verdict was that high quality, modern pencil barrels are just as good as heavier barrels, but only if properly heat treated. Crap pencil barrels are to be avoided.
No. Even though there is more heat being distributed to the bolt carrier in an AR, the parts don’t get anywhere near hot enough to damage anything or cause any functional disadvantage. In fact the actual advantages of the AR’s gas system (less parts, lighter weight, smoother recoil impulse) far outweigh any perceived advantages of a short-stroke piston system.
So basically, barrels get hot on piston systems. Barrels, bolt carrier's, and gas tubes get hot on an AR (whatever you want to call that gas system). So both of them get hot in the area where you hold them, but the AR has a second hot thing that runs the full length of the handguards and is closer to the hand than the barrel.
And your conclusion is the opposite of handling in reality.
@@InrangeTv I'm just looking at the footage. Both barrels were hot. Both gas blocks were hot. The AR gas tube and bolt carrier were hot. So both were hot in the same places, and the AR was hot in some extra places. What am I missing? Was the AR less hot at the barrel?
@@mkultraification the same ammo produces basically the same amount of heat. It being in fewer places means those places are going to be hotter.
@@bubba200874426 Maybe, but does it actually make a difference? Is a 245° piece of metal more comfortable to the touch than a 250° piece?
Cool video, many thanks 👍
id like to see more thermals on more guns like the fal, g3 or an Aug.
Thanks for the intel. I noticed the other day that my Sig 716 wasn't heating up as much as my buddy's AR. Now I know why.
I am absolutely not a "gun guy" but i swear i'm getting more info out of these video about engineering design then in my engineering design classes :D
That was fun , I like my FN scar 16 & 17 , that said ..my friends AR 15 & 10 run just as reliability at a fraction of the cost .
I do wonder if the less bolt heat advantage is why the M27 IAR got accepted as the USMC SAW instead of other entries. Alternatively, one of the other entries, SCAR HAMR, also operate on a short stroke piston, perhaps there was a flaw in the SCAR design that didn't made it favorable compared to HK's bid?
m27 is just basically M4 with short-stroke so less training because the troops is already familiar with AR design
The HK has the advantage is that the controls are the same as the standard issued rifle. No difference in the manual of arms so every one in the squad can use it with very little training. That additional training for the SCAR can add up in costs really quickly.
and costs can spike up because not everyone in the corps is a gun nuts
More thermal analysis! maybe P7 vs Glock? Idk but this is a cool concept and interesting to watch.
saw a great video to illustrate this point years ago with some piston ar15 style rifle, dumped 3 mags on full auto, dropped the last mag and immediately opened it up and pulled the bcg out and held it with bare hands (no video cuts, was holding the bolt less than 8 seconds after the last shot fired), then challenged the video host (i think it was an old tv show) to do the same with his DI gun
Very Interesting, Thank you.
logically knew this never really thought about this. good short video.
0:56 "white is hot and dark is not" I love how that rhymes lol.
Can you do the same with a G3. During my military service in Sweden -89 I was equipped with a G3. I pretty much burned my hands after 3 "mag dumps" The whole damn gun was red hot. I really take a G3 in front of every other M16 / AK5 (FN?)
really like that weapon!
Why would you take a G3 over those weapons?
@@NavYblu99 I like it. It's so easy!
Typical Swede, blowing their load too quickly. Just shoot properly, don't mag dump.
@@glandhound Taught me after all the Amisar I've seen. do not want to be worse
@@TheTuxMaster It's heavier, longer, and higher recoiling than the other weapons you mentioned. How is it "easy" by comparison?
It’s interesting to think about the triad offs of these two systems along with others, whether it be reliably over extended firing or accuracy over longer durations or fire. I,as a viewer would love to see a comparison of the accuracy over sustained fire and as a result of that test see the reliability of these two systems. The way they disperse heat is an engineering marvel and an intentional decision..... but who will win????????
Nice explanation
Do more action types please. Different handguard materials and designs. Heat molestation is really a thing when you shoot a lot. This could get interesting
I thought HK made the Scar, anyways great video and keep it up man!
HK makes the 416 and 417 which comes from the same program where SOCOM wanted a replacement for M4/M16.
@@StormBringare username checks out
@@ChucksSEADnDEAD
It's almost like I chose it for a reason 😘
It was a fascinating expose.
Can you do the Ar 180 upper? ( thermal image it)
The predator test
Just smear mud on it. It’ll still work (maybe).
@@defaultusername123 icwutudidthar
More thermal videos please. Interesting stuff!
Id like to see how a roller locked/delayed system compares
Extremely interesting
Thank you.
Very interesting!
Great video
Thanks!
Thanks for posting this. got my tax stamp, about to assemble my piston upper sbr
Another point of note is the balance between the two systems. It’s not as pronounced with a rifle designed from the start to be a piston gun but on ‘converted’ ARs like the T91 the change in balance towards the front is majorly noticeable and it takes me a while to compensate when going from a 14.5 AR to my T91 clone.
That BRN-10 looks so good
Already watched this on Facebook but have some algorithm food
DI belongs in a museum.
Well, it's great because "cheaper"
No it doesn't belong in a museum because like the other guy said it's cheaper than a short stroke piston
It's called you have a soldier who has the best thing ever created and that is discipline who is going to clean his rifle no matter what and last time I checked an H&k 416 based M27 costs $1,700 worried direct impingement M4A1 runs between $700 and $800
We've been using the AR-15 family since the 1960s we haven't encountered any major problems because of the gas system it works so why get rid of the weapon?
Enlightening
Very interesting.
Good Content Homies
Very interesting video. It seems like the heat is "spread out" more in the DI gun. Like no one spot gets as hot as the piston area in the short stroke gun. I would have been interesting to see what the temps were in the hottest areas of both guns. Keep up the good work in range.
Every time I see one of these videos I wonder if this is Karl's back yard. And if so...simply beautiful.
Nice animation
Very interesting, thanks Karl!
Interesting. I would really like to see the bolt face next time around. Too see how much heat transfers to the bolt in both systems.
Im interested how the FN Scar 17 compares to the HK Scar 17....People can be so pedantic and asinine sometimes... you knew what he meant!
Obviously there's a finite amount of heat generated in each round fired, regardless of which gun fires it. Seems like the DI spreads that heat around a little more evenly while the piston concentrates it. I wonder if this would mean that the zero or group size would wander more on the piston as the barrel just heats up more and more compared to the DI that could fire more rounds before the barrel would be as hot as on the piston gun.
Very cool, this old dog learned a new trick
this is a really cool idea
Interesting video. Are you sitting out in the desert southwest someplace? Looks like west Texas
DI tube delivers exhaust gas to bolt carrier group which makes it dirty (carbon buildup). What is interesting - Eugene Stoner switched to short-stroke gas piston system after AR-15 - in AR-16, AR-18 and Stoner 63
Because of patents...
@@InrangeTv How patents can prevent using gas tube in AR-16? It is developed by the same company as AR-15 - ArmaLite.
The gas system and AR15 action was sold to Colt before the development of the AR18.
oh so thats why the AR family of charging handle is the way it is... cool
Interesting video. Confirming what I allready knew/assumed.
Since the video is about the advantages and disadvantages of semi-DI vs. short stroke:
what are the differences slash advantages and disadvantages of long- vs. short stroke?
I'm guessing the short stroke can be made a bit lighter, but I don't know if the weight saving is significant.
It's significant by reducing the bolt mass that needs to be slowed down when the cycling stroke is bottoming out. A heavier bolt bottoming out on it's return spring means that the recoil impulse will be felt with a pronounced "peak".
The difference is probably with LS you have more mass kicking back, compared to SS, but LS is more crude/reliable and doesn't really care if you're shooting proper ammo or some ammo-shaped peace of shit. So again, compromises.
long stroke means less moving part
short stroke means lighter part and less mass hitting your shoulder
Long strokes are always harder to control on full auto because of the larger mass moving through the weapon, but long strokes have the advantage of less parts overall. However, I really don’t think short stroke is at a disadvantage because of one or two extra parts in the gas system.
Long stroke has Less peak pressures and less peak g forces. Gun and optics last much longer.
A question that struck me as I watched the final comparison is if either system cools down faster or if that's just a mater of the materials ability to radiate heat. You'd think more surface area would allow better cooling but theory isn't always practical.
I have both kinds of ARs. I have the Sig 716 and 2 516 piston and number if DI ARs. The biggest advantage of piston guns is there's no need to clean the BCG. You can run a massive amount of rounds through them and they are still clean. They do run much cooler also. Like when the man from HK dumped a 100 drum, broke the gun down and grabbed the BCG in his hand held it and said, "just try that with your DI gun" Then there's the price point, piston gun have a high price tag.
You should do more videos like this
I can't say this was surprising, but I'll stick with semi-DI. Did you get the BRN-10 handguard heat shield liners?
this is a dumb question but would this effect the amount of damage or velocity of specific gun can do if it has one system or another
No, absolutely not.
2:27 Looks like there are -brass- flakes or sparks coming out of the ejection port.
If they're shooting steel, sparks aren't that uncommon on ejection
Amazing stuff!
Great video!
i though the scar was a long stroke gas piston system.
what about long stroke vs short stroke? which one will get hotter. akm vs vz58 for example. or svd vs romanian
Nice work fellas
Semi-DI, I hope that really catches on.
I don't. The Stoner version of DI is in no way a gas piston.
Could you please film a series of thermal videos with different types of AK/handguard setups? I have owned a few AKs and one recurring problem seems to be just how hot they get from shooting. A lot of the handguards that I used have not been up to the task of keeping all that heat away from my hands.