How Does it Work: Gas-Delayed Blowback

[@codscout3]

Keep up these videos on the mechanisms Ian. Super interesting content!

[@highlandoutsider]

You can pick up a a fair bit of knowledge on the mechanical functions of firearms from your regular videos but this in-depth series is just fantastic, awesome work as always, thanks Ian

[@denaldouglas8293]

Been trying to get an idea of exactly how gas-delayed blowback works to see if it's appropriate for a fictional pistol design in a project I'm working on. I do have a degree in Firearms Technology but there wasn't much in my classes on gas-delayed blowback. Having a visual example helped me see that it does work exactly like I thought it did. This video was a major help. Thanks.

[@therandomdickhead5744]

I don't understand all of it but I do understand a bit more than I used to. Thanks, you're a pretty good teacher.

[@jayzenitram9621]

Ever try to pump a bicycle pump really quickly while holding your thumb over the nozzle? Same concept: the bullet is your thumb, as soon as it unclogs the "nozzle" you are able to move the piston more easily.

[@andislazdins3322]

@RocketSurgeon ""

[@nickverbree]

I LOVE these mechanism videos. So damn interesting.

[@cvtt3194]

Love the video. Would be interesting to see a slow motion firing comparison between the delayed gas blowback and regular blowback pistols.

[@jeremya6739]

I was at a 2-day CCW shooting class a few years back, and one of my classmates, a doctor and a pretty cool guy, had brought an HK P7M8. It's a great choice for a carry gun but NOT for a shooting class! Thirty minutes into the class I loaned him my spare pistol for the rest of the day because his HK was getting too hot to handle. On day two he brought a USP9 instead. He wanted to use the P7M8 because that's what he carried. He learned the hard way that it's a fine choice for a carry gun, but it's just not an option for a high volume shooting class. It worked out great for me though. For the first time I actually got to spend some time shooting a P7, and I've been wanting one ever since! They're great little guns, except the M10 version. That one kind of sucks. Not all 9mm's can be successfully adapted to .40S&W, and the P7M10 is a good example of a failed attempt.

[@betaich]

Thank you Ian for making these explanation videos, it makes it so much clearer.

[@RitzSamaritano]

Thanks Ian, this kind of videos are super interesting and really useful to firearms newbies like me 😃

[@buildingblocks51]

I love this series. Thank you so much for taking the time to share this knowledge in such a concise and easy to follow manner.

[@neilshark6361]

Top work, really enjoy these technical operation videos. Keep em coming please Ian.

[@mjbalice]

Another fine educational video by Ian. I learn so much from this guy. His presentation and delivery is ear candy to me👍

[@garypack1709]

You are an excellent teacher Keep these how does it work vids coming

[@Vormulac1]

Easily the best description of gas delay I've seen. Nice work.

[@matthayward7889]

03:31 as usual, Ian answers questions I didn’t even know I had. Excellent!

[@phoenixinvictus9880]

Fascinating info on a system I didn't know existed. Thanks Ian!

[@troy9477]

Nicely done, Ian. I worked in a large gun shop from 93-95. I remember one day pulling out the P7 and its manual to fieldstrip it (pretty easy) for my own edification. It was interesting to see the internals and comprehend exactly how it works. I still want one someday, but the prices on the used market keep going up.

[@sethgordon4473]

Hi Ian, I loved seeing your Heritage Stealth, the crappiest gun that could have been a world beater. I have one too. In a perfect world, I would love to talk to you about it, and all the design and manufacturing flaws that kept it from being a Glock 26 killer.

[@MiniRPD.]

I never thought I'd see the c1000 in a video, let alone another c1000 owner. The little thing is nothing more than a gut-buster. reminds me of the Noisy Cricket from men in black. Interesting little piece

[@GunFunZS]

I have long thought thaqt gas delayed blowback would be optimal for shotguns. This is because of the enormous range of variation in energy and pressure from shell to shell. Gas delay would automatically proportionally increase delaying force with chamber pressure. That solves the biggest challenge for semi auto shotguns. The other big challenges have to do with the wonky shapes (plural) of shells.

[@Schmunzel57]

Sounds interesting.

[@keyhole9601]

Absolutely interesting system. Have you seen the new Luago Alien 9mm?

[@kalmenbarkin5708]

Key Hole I have and it’s the only handgun I’d consider truly revolutionary in my lifetime at least from already proven fully functional tech (some Gauss guns are also but they don’t work consistently yet)

[@keyhole9601]

@@kalmenbarkin5708 It's a good project but a young construction. It will improve with the time. There is a solid firm behind this gun. Actually I believe that is the most advanced gun on the market.

[@kalmenbarkin5708]

Key Hole it’s what I would consider a beta test (5k + isn’t market for a Czech gun) and so far the reviews are raving as with all new systems there will be kinks that need to be worked out but I’d agree it’s the first really fresh take on what a handgun can be in a very long time

[@gustavmeyrink_2.0]

@@kalmenbarkin5708 5k+ isn't the market for a Czech gun? Have you told the Czechs who make the FK Brno Field Gun?

[@kalmenbarkin5708]

Gustav Meyrink does anybody buy that overpriced CZ75?

[@postalbyke]

This actually did answer some questions, thank you!

[@AxLWake]

The P7 is so cool. I would like to get my hands on one some day.

[@AxLWake]

@alan wake I'd rather have another version than the m13. The double stack magazine makes the grips thick and weird looking.

[@candidmoe8741]

I find Gun Jesus' presentations clearer than any other fancy CGI animation in KZbin, mainly because he explain what's happening "real time", with the real thing in front of you. Another chapter for next book!

[@drummaghua2687]

How about the Horn prototype STG-45? Is it a real gas-delayed blowback rifle?

[@sleepypipit9631]

Thats one dirty Steyr

[@KB4th]

May I just mention..... Thank you Gun Jesus, you my friend are amazing with the mechanics of weapon systems.....

[@_ArsNova]

Surprised to not see a Walther CCP in this video. Great little gas-delayed handgun.

[@mihjq]

Thank You. In this kind of videos some kind of simple schematic drawing would add clarity. Even a pencil sketch. Keep up good job!

[@EnglishCountryLife]

Ian this series is some of your finest work! It may seem to an expert like you as "stating the obvious", but I have owned firearms for more than 40 years and have learned a great deal. Thank You

[@Legolas15989]

You've never done, or at least I've never seen on your channel, a video about c1000 heritage stealth pistol that you demonstrated in this video.

[@ForgottenWeapons]

That's true; I should probably do it. :)

[@RadicalFitnessLLC]

Thorough, informative, and interesting as always! Thank you, Gun Jesus!

[@jacobhobbs6918]

I love this series. What other types of delayed blowback are there?

[@ldtexas1648]

Delayed roller lock.

[@earlycuyler2295]

Please do the ar 15/ stoner gas system... Im getting sick of explaining that the gas key fuctions as a gas pistion,and that it is NOT actually "direct impingment".

[@brzroman]

amazing playlist, thank you!

[@eksbocks9438]

The Grossfuss Sturmgewehr is another example of Gas Delayed Blowback. And the bolt is a lot simpler than the VG 1-5. Thought, it was only an experimental gun at the time.

[@PRACERZ]

And yet Another Great video teaching us, thanks Ian greatly appreciated !

[@mandernachluca3774]

You absolutely have to take a look at the API systems next time, they are a very interesting variant of the delayed blowback system.

[@gustavmeyrink_2.0]

My favourite operating system.

[@baconx4]

Steyr GB is a neat pistol. It's understandable why it lost to the Glock but wouldn't history be interesting if it had won the Austrian pistol competition.

[@sejembalm]

Yes, the Steyr GB was a very interesting and innovative pistol from 1968, having the accurate (but hot and dirty) gas blowback system, high (even for today) 18-round magazine capacity, polygonal rifling, and a reduced number of working parts. Steyr expected the GB to be a shoo-in for the Austrian military contract, as it was well understood that a domestic Austrian design would receive preferential consideration. However, a no-name bayonet supplier named Gaston Glock appeared out of nowhere and won the military trials with his polymer-framed G17. Steyr certainly hadn’t expected that, and they proceeded to enter the GB in the 1983 US military pistol trials - where it lost out to the Beretta M92F despite many good qualities. www.forgottenweapons.com/other-handguns/steyr-gb/

[@NAzTRAdamUS]

You're so smart, Ian.

[@davidwallace5738]

Great explanation. Thank you sir.

[@loupiscanis9449]

Thank you , Ian .

[@doktour_tie]

Ian you keep it entertaining and educational

[@savagehenry889]

One other drawback you didn't mention is suppression. Although fixed barrel guns are usually easy to suppress because you don't have to worry about a recoil booster, gas delayed guns don't suppress well because the added backpressure can cause cycling issues. Supressors can be made and tuned for specific guns like the VAIME suppressor made for the P7M13SD used by the Argentine Navy, but it was absolutely MASSIVE in order to reduce backpressure via large internal volume and required equally absurdly long barrel threads to support the weight. Needless to say they weren't very popular or successful.

[@Lvkan]

Ahh the good old VG 1-5. The reason i found this channel and subscribed with my old account. This is going to be a long night of watching 6 or 7 years old FW viedeos.

[@tinokarl64]

Hey Ian, thx for all your awesome videos, what would define sustained fire? are we talking one mag or more?

[@shawnr771]

Cyclic rate is the fastest speed the weapon is capable of firing. Usually given for automatic weapons. Weapons tend to overheat very quickly. At some point usually causing some sort of malfunction. Sustained rate is the rate of fire that the weapon can shoot for long periods of time without overheating or malfunctioning. A machinegun might have a Cyclic rate of 750 rounds per minute. Hold the trigger back and let er rip. The sustained rate might be 125 to 200 rounds per minute. This allows the heat to dissipate a little bit. It is one of the reasons Machinegunners are taught to shoot bursts. Still going to be hot. The quasi exception to this rule are water cooled MGs. Some had sustained rates very close to the cyclic rates.

[@tinokarl64]

@@shawnr771 thx for the in depht answer

[@shawnr771]

@@tinokarl64 You are welcome.

[@jamesgravel7755]

I’ve never seen this and now I must have one. Damn it Ian. I’m three years late

[@shiftyschultz3254]

I can't tell if this or lever delay is my favorite gun hipster method of operation...

[@Leatherman154]

Got my gun jesus poster today! I was planning on hanging in the bedroom, but the wife put a stop to that. Garage it is honey haha.

[@Leatherman154]

Naturally. She's changing the oil in the truck as we speak. I said as long as you're done in time to get dinner started that's fine....Oh shit, she's coming shhhhhh.

[@Leatherman154]

@@ReiBacalhau knowing my wife, I highly doubt there would be much of a delay haha. I'd wake up in the middle of the night with her mumbling something about have the mess cleaned up by morning.

[@MrBigboy3178]

I’d love to see a video about that Stealth C-1000, history and all

[@jamwheeler]

a slow mo video of a blow back pistol and a gas delayed pistol side by side would be interesting in my opinion

[@merakliu]

Thanks Ian!

[@leesherman100]

Best damn firearm vids anywhere.

[@seanhartigan2003]

You should do primer actuation next. Really weird but really cool

[@beaker126]

Hi Ian, will you ever do a video about the Heritage Stealth, or have you done an older one I might have missed?

[@kylelee1911]

Really interesting and great video

[@p0331546]

Hey Ian, take a look at Laugo Arms Alien pistol. It's basically an upside down H&K P7 internally, kinda solving the heat issue I guess. Brilliant design.

[@jasonarmstrong5750]

Easily my favorite delayed blowback mechanism

[@massrdmdoer7348]

thanks

[@stevep5408]

Great explanation as usual!

[@dadahoshi]

could sb. please explain what force pushes the slide back once the bullet has left the barrel.

[@charlesinglin]

That answers a question I had about the VG1-5. It seemed odd to me that they placed the gas ports so close to the muzzle but then if the gas is only used as a buffer at the end it makes sense.

[@thechilledonion9313]

So easy to understand shown that way. Thanks Gun Jesus!

[@fcfdroid]

Good stuff

[@spiritsquatch]

Great video. I'm new to this, but the physics behind gun action is pretty fun. What's your favorite physical principle used in a gun?

[@russwelday]

Now do roller delayed blowback.

[@kiwuuspurr1927]

Why is it that he has about 1.2 Million subs but still gets 9,943 views???? He needs mooore views

[@jwc00789]

Excellent explanations! The new Walther CCP is a Gas Delayed Blowbacked action, very similar to the H&K P7. The heat issues have kept me from buying the P7 and the CCP, but I'm seriously tempted by the new CCP M.

[@Lazarus7000]

You should do one on said Volkssturm rifle's system and other, shall we say, "moon-operating principles"; systems which appear on only one or a small handful of guns and have fallen out of favor or never caught on.

[@jordanhorst6]

I wonder, Could a sort of integrally suppressed pistol be developed with a baffle stack connected to the slide which works simultaneously to slow the slide as well as contain a bit of the muzzle report? Perhaps the barrel would be ported like the first pistol shown also? And would a baffle stack create more or less force pushing the slide forward keeping the chamber closed? Multiple surfaces each being forced by gasses, hmmmmm?

[@M.M.83-U]

Thanks!

[@Pcm979]

The VG1-5 isn't gas-delayed? I take it that there's been new info since your 2015 video on the subject; Can you tell me where I can read up on it? I'd like to know about this buffering system. Thanks!

[@AverageJoe4063]

Please do a video on that Heritage Manufacturing Stealth C-1000.

[@akukorhonen5182]

That is a gas operated delaying system. How about a system that is gas operated unlocking system? E.g. a gasport in the barrel opens behind projectile, allowing gas to trigger the opening of the bolt via some kind of system reminding Brownings potato digger or something. Relatively light bolt remains locked and closed until the bullet reaches a certain point down the barrel end, releases the light bolt which still gets a little, but enough blowback to cycle the gun. Gasses needed to work this system should be minimal, so they can well be vented out without heat issues. As a bonus; With a dud round, there is no possibility to cycle a new round with a bad bore obstruction.

[@thalesofmiletus6162]

Hey Ian, seeing how you have been checking out machine pistols lately, have you heard of the OTs-33 Pernach, the VBR-Belgium? I’d like to see what you think of those!

[@brennab2697]

So definition wise, how does something like these models differ from what is consider gas operated? I noticed that in one of the barrels there was a hole that allowed gas to escape after the projectile passed a certain point. Isn’t that gas operated ? And If not am curious as to what makes it different

[@kmech3rd]

Wasn't the Vektor CP-1 similar? Interesting gun. Too bad it didn't survive the recall.

[@walangchahangyelingden8252]

A good idea.

[@alexandermarinin7036]

What about velocity loses?

[@FrankVJr]

That H&K P-7 is just like the Walther CCP. Great channel 👍🏽

[@smolboyi]

mind is blown

[@yuyu900726]

The biggest confusion for me is if fixed barrel is good for accuracy, why isn't this implemented on common handgun? I thought the tilting barrel was mainly for feed performance.

[@yankeeredneck7229]

It would be really cool to see someone take a gas blowback system like the first gun that you should with the barrel as the piston and make suppressor gas blowback operating gun to where the gun doesn't have it's gas system without the suppressor but not like oh welrod even though they're really cool so again that has to operate the action and that's damn near completely quiet using only the suppressor that would be really cool for a semi-auto that's the other thing well rides are single shot even though they have a MAG

[@hawk66100]

Praise the gospel of Gun Jesus! Great video as usual man 👍🏻

[@nejiniisan1265]

Lovely

[@RalphReagan]

Cool, thanks

[@voya8480]

AH-104 is gas-delay long rifle.

[@chuckbridgeland6181]

Heritage Stealth. Interesting. Absolutely never heard of that one before.

[@virutech32]

Love these hdiw vids.

[@nunzinho91]

Nice video, nice job :)

[@andrewwaterman9240]

Sheesh, that Steyr hasn't been cleaned in awhile.

[@tommasomorandini1982]

Did you get monetization on youtube working again? Because there are ads before your video. I'm not complaining, I'm just asking.

[@Matt_The_Hugenot]

I wonder what the upper limit for cartridges is for gas delayed blowback? I had thought it would be suitable for a pdw carbine concept especially if the gas vented into a piston above the barrel bringing the barrel more into line with the hand-shoulder axis and where the heat could be more easily dealt with.

[@aurorawhorealis]

I've never seen/heard of anything successful above 9mm for gas delay, it's really not a good system for powerful cartridges. If you must have a blowback rifle, roller delay is basically the only good option, and even then, why not just use a piston or DI gun? If you're worried about an inline barrel and recoil impulse, blowback of any kind will recoil harder than anything gas operated, it's just a more violent system.

[@Matt_The_Hugenot]

@@aurorawhorealis The only production gas delayed blowback gun I can think of using something hotter than 9mm parabellum is the .40 S&W version of the P7. The reason for choosing this system above roller delayed or gas operated systems is simply cost and complexity, it falls between simple blowback and more mechanically complex designs gaining some but not all of their advantages.

[@aurorawhorealis]

@@Matt_The_Hugenot Oh yeah, I forgot they made production runs in .40. So yeah, just judging by what actually has been successful with gas delay, I'm not sure it could handle a rifle round, even 5.56, not comfortably at least. Would probably get way hotter way faster with rifle rounds too, it won't benefit from gas moving and venting like a gas operated gun. I get the "perfect middle ground" idea you have, it sounds compelling. But, in a world where a $700 AR can compete with or beat literally anything else, would a brand new design using that system actually be cheaper to produce?

[@Matt_The_Hugenot]

@@aurorawhorealis I'm not sure what the limiting factor is, pressure, muzzle energy or velocity. The only typical rifle cartridges I'd consider are subsonic ones, .300 AAC Blackout seems obvious, though that brings risks from someone loading supersonic ammunition. 5.7x2.8 is a logical candidate, it's designed for the pdw role. I'd like to see a design in .30 carbine, it's an underappreciated round. Comparing it to a normal AR is interesting. Someone could build a gas delayed blowback upper in 5.7x2.8 that fits into an AR platform it would have less parts and wouldn't require the buffer spring making it even cheaper.

[@aurorawhorealis]

@@Matt_The_Hugenot Pressure is above all other factors, though in a blowback having low enough bolt velocity/enough dwell time to not outrun magazines and extract cases instead of rip case heads off is an important and sometimes tricky consideration, too. Okay those cartridges are different, only a little higher pressure than handgun rounds. I think .30 carbine would perfectly fit the role you want, it's basically a rimless version of .32 WSL which was used in straight blowback guns, it would probably be pretty tame with some form of delaying. The p90 is straight blowback, no delaying necessary for 5.7. There actually is a 5.7 AR upper available, it's called the AR-57 and costs about $750, less parts doesn't always mean cheaper when there are a tremendous amount of ARs built every year, making production fairly cheap despite their relative complexity, they also are very efficient to produce with modern manufacturing techniques.

[@michaelblacktree]

Interesting. I wasn't even aware of gas-delayed blowback.

[@markwhite1780]

I always learn something. And that's the point isn't it?

[@rustlebruxz0013]

I'm a little surprised the Walther CCP wasn't one of your example guns. Is it the only one still in production today?

[@VincitOmniaVeritas7]

And now the Genesis 12 uses this system

[@yankeeredneck7229]

And make it with a quick-change barrel and the gas system I e suppressor and make the outside of it a lot easier to radiate outside jacket of the barrel suppressor gas system combo

[@Schmunzel57]

Can you compare the energy, lost from the cartridge, to other systems?

[@amigi968]

Isnt this a re-release? Didnt you already do this?