Enhanced BCG vs Adjustable Gas Block

[5RWill]

I'm sure this has been asked but didn't see a sticky thread. I'm finishing up my 11.5 pistol before i file form 1s for both it and the 300blk i have. Google hasn't turned up a 100% answer, though my gut tells me if i can control gas pressure from the carrier i'd rather do so than the block seizing up. I know SA has the bleed off gas block but wasn't sure if it would eventually seize up or not.

So specs below. I haven't gotten the buffer yet, i had planned to use one of my BCM carriers but am rethinking it now.
BA modern series 11.5" .073
Carrier undecided
GB undecided
Buffer undecided
carbine length gas
JP polished spring
SBA4 brace/buffer tube

 

[Evolution 9]

Since your gas port is reasonably sized (extremely rare), you don’t need an adjustable gas block. Any quality BCG will work well.

Will you use a suppressor? If so, which model? (Some produce more back pressure than others).

You won’t have to worry about overgassing with that gas port size, but for future reference, if you have a system that’s over gassed, the solution is to fix the problem (make it NOT over gassed) this can only be addressed at the gas block. ALL other solutions (like special carriers) are bandaids to a problem that should have been addressed.

 

[5RWill]

Since your gas port is reasonably sized (extremely rare), you don’t need an adjustable gas block. Any quality BCG will work well.

Will you use a suppressor? If so, which model? (Some produce more back pressure than others).

Yes probably the omega 90% of the time when suppressed and the hybrid the other times. Config for both is Area 419 suppressor adapters and flat end caps. That said it wont be shot solely suppressed i want it to function with or without the can.

 

[Evolution 9]

I’m not familiar with those designs enough to tell you about their back pressure.

If they produce enough that the gun struggles to run reliably, add an adjustable gas block. Usually one setting will work for suppressed and unsuppressed. That way if it gets stuck that’s not a problem.

Once gas is set properly, I’ve found LMT enhanced carriers to help with reliability due to the difficulties added by a silencer.

 

[Darqusoull13]

My 300 BLK + SiCo Omega combo is set up to run sub+can and supers +/- can. The adjustable gas block will give you a bit less gas back in your face for super+suppressed if you tune it to run subs suppressed instead of just going full open. Omega is not bad at all on back pressure and 300 BLK isn't a gassy round to begin with.

I prefer using a JP Full Mass or VMOS carrier and H2 Silent Captured Spring in suppressed AR's. The extra mass in the operating system gives you a wider window of operation for all the combinations you can run a 300 BLK gun in.

 

[Alpine 338]

I went with the LMT enhanced Bolt and Carrier, along with an SLR adjustable gas block. I shoot both suppressed, and unsuppressed. Have it tuned so that I don't need to mess with the gas block when switching between different ammo, etc.

 

[Huskydriver]

Will if your supressing an ar do yourself a favor and get a SA adj gas block. Way easier then trying to tune buffers and bcgs. I have all of mine tuned so they cycle unsuppressed reliably but the trade off is they are a hair overgassed suppressed. Sometimes if I know I'm going to be shooting 100% suppressed that day, I'll bust out the Allen key and turn down the gas 4 clicks it's that easy.

 

[5RWill]

I went with the LMT enhanced Bolt and Carrier, along with an SLR adjustable gas block. I shoot both suppressed, and unsuppressed. Have it tuned so that I don't need to mess with the gas block when switching between different ammo, etc.

I started to go SLR but a buddy of mine has bricked two of them seizing up, he still likes them but as he and i were just talking he just doesn't trust them enough to put them on a gun for self defense or duty. 3-gun, range, etc. sure.

Will if your supressing an ar do yourself a favor and get a SA adj gas block. Way easier then trying to tune buffers and bcgs. I have all of mine tuned so they cycle unsuppressed reliably but the trade off is they are a hair overgassed suppressed. Sometimes if I know I'm going to be shooting 100% suppressed that day, I'll bust out the Allen key and turn down the gas 4 clicks it's that easy.

This was my original plan thinking that the SA would be less prone to clogging. That said i wouldn't think it would be incapable of seizing up as carbon hardens over time. Ever heard or seen a SA seize up? I haven't i'd be curious to see if it were possible.

 

[Evolution 9]

What do you mean “seize up”? Like stop the gun from functioning?

If you just mean that it will get stuck on your selected gas setting, that’s a good thing. Get it set right and forget it.

 

[5RWill]

Yeah i really didn't ask him to clarify but i guess that's what he meant. I guess if it's already set it's a none issue. Didn't think about it like that.

 

[padom]

I use SA gas block, Toolcraft or Rubber City full mass BCG. Tuned it to lock back on an empty mag and go shoot.

Who cares if it get.carbon up, unless your constantly tuning the thing, for what reason I dont km now...

 

[MontanaMan]

The SLR gas blocks disassemble easily for periodic cleaning & work just fine.

MM

 

[Dev L]

I set up an SLR on a 223 for the minimal setting to lock back on regular power ammo unsuppressed. It does that. Suppressed with an Omega 300 it has a nice ejection at 3:30. It is locked up from carbon. Perhaps if I hit it with some solvent, penetrating oil, and tried to move it when HOT it would break free, but WHY would I? It is set perfectly. That is with a JP LMOS carrier. H1 buffer, and carbine spring. If I changed the spring, buffer, etc. I might need to change it but since everything works well I am good to go.

 

[5RWill]

I got the superlative bleed off and am going to probably pick up the Geissele H1 and braided spring. Stick with the BCM BCG i got and run with it once set.

Thoughts on charging handles for blowback? Is a gasbuster or Raptor-SD worth the money? Or just get a Raptor LT for half the price and adjust the gasblock to mitigate blowback?

 

[LeadZeke]

No BCG replaces a good AGB like the superlative arms block, so you made the right call there. The LMT Enhanced BCG though is unique and uniquely reliable and durable and one of the few legit upgrades for any AR15. Pricey though.

Best charging handle for blowback is the Armageddon Tactical GMS-15 Gen II.

 

[Primus]

Bullshit. Every adjustable gas block will eventually fail. Most designs are shit. Even the best ones require servicing or they will lock up. There is a reason they are a hard no on working guns, despite the benefits.

The bootleg carrier is probally the best invention for the AR in the last 20 years. Very reliable, cheap, dumb proof. Go with this and tune for suppressed and unsuppressed. To fucking easy not to.

 

[padom]

Bullshit. Every adjustable gas block will eventually fail. Most designs are shit. Even the best ones require servicing or they will lock up. There is a reason they are a hard no on working guns, despite the benefits.

The bootleg carrier is probally the best invention for the AR in the last 20 years. Very reliable, cheap, dumb proof. Go with this and tune for suppressed and unsuppressed. To fucking easy not to.

Really? So I have AGB on AR's that are 8-10yrs old with 20,000+ rounds on them that havent failed yet. Lets stop using terms loosing. They dont "LOCK UP" to where they arent usable. The adjustment screw will get carbon on it which will prevent you from adjusting it if you dont know how. Additionally, not sure what your adjusting after tuning the gas block for your rifle?? The point of an AGB is to tune it for your rifle, not tune it once a week for the life of the gun.....

As per SLR, to adjust a seized adjustment screw.... Put the short end of the supplied allen wrench into the adjust screw and turn it so your are OPENING the gas port, not screwing it in (closed). (You will never have enough leverage to break it free to open it with the long end of the supplied allen wrench. Must use short end.) Then work it back in. You will not be able to move a seized screw 99% of the time if you try turning it in (closed). Only time I have to do this is when I change a barrel and need to re-tune. Easy, no issues if done right. If not, get an SLR rebuild kit. They send me them for free.

So, no. Adjustable gas blocks do not FAIL. Never seen one FAIL in my life. Never seen a gun stop working or go down because of an AGB. Thats a a false statement. Adjustable gas blocks get carbon on the adjustment screw, making it difficult to "adjust" the screw the more rounds you put through it and you must know how to fix that. But......who is adjusting their AGB's after they have been installed and tuned?? never heard that one before..

 

[Evolution 9]

Bullshit. Every adjustable gas block will eventually fail. Most designs are shit. Even the best ones require servicing or they will lock up. There is a reason they are a hard no on working guns, despite the benefits.

“Hard no on working guns”?

Do you have any “working guns”? (And what does that mean to you?

I’ve had several working guns and some have had adjustable gas blocks, (same with my team members) so, no, they are not a hard no on working guns. They work in the real world.

 

[Primus]

If you have never seen an AGB fail you either need to go buy a lottery ticket or you have almost no experience using them. They all fucking fail under use in any reasonable sample size. Some are manageable with maintaince but the vast majority are a ticking time bomb waiting to happen. So when people like you say shit like this, it just tells me they are either incompetent or have so little experience they just don't know better. Ignorance is bliss.


20 years building and repairing small arms, all over the globe for the us gov both in uniform and out. I've probally put more rounds downrange in a combat zone than you have in your entire life. So save the bullshit for someone who doesn't know better. They have been tested extensively and always come up short.

Stop pretending like you have any idea what your talking about. You don't. You don't think KAC would be using them after dumping millions into R&D over the last 35 years? Instead of having to design a system that works reliably both suppressed/unsuppressed with both commercial and .mil ammo without overgassing the system. Why would they not use an adj gas block since that would solve the biggest issue?

 

[padom]

If you have never seen an AGB fail you either need to go buy a lottery ticket or you have almost no experience using them. They all fucking fail under use in any reasonable sample size. Some are manageable with maintaince but the vast majority are a ticking time bomb waiting to happen. So when people like you say shit like this, it just tells me they are either incompetent or have so little experience they just don't know better. Ignorance is bliss.


20 years building and repairing small arms, all over the globe for the us gov both in uniform and out. I've probally put more rounds downrange in a combat zone than you have in your entire life. So save the bullshit for someone who doesn't know better. They have been tested extensively and always come up short.

Stop pretending like you have any idea what your talking about. You don't. You don't think KAC would be using them after dumping millions into R&D over the last 35 years? Instead of having to design a system that works reliably both suppressed/unsuppressed with both commercial and .mil ammo without overgassing the system. Why would they not use an adj gas block since that would solve the biggest issue?

Typical if .mil does it its god response. I dont give a shit how much you puff your chest and lay down your resume. Doesnt change the fact that I've never seen an AGB fail, causing a gun to go down, over 100's of thousands of rounds. That there is a fact.

 

[Primus]

Sorry I find that hard to believe. Too much evidence to the contrary. Ask any SME and they will tell you exactly what I just did. They have been tested extensively by the .mil, defense industry and the commerical side. Note how you do not see them on any guns that go into harm's way( and don't confuse a short piston system with DI).

This is fact.

 

[Evolution 9]

Primus,

You still don’t seem to understand how most adjustable gas blocks are used. Most are only adjusted once and left in place. Some even have set screws to intentionally “seize” them in place until carbon buildup prevents accidental movement. In other words, failure from seizing is physically impossible. Seizing is ok, if not actually desired.

If you’re as experienced as you say on the mil side of things you probably understand the danger of using a switckblock style (intended to be constantly adjusted for suppressed/unsupressed) in a combat environment.

Again. Your statement is patently false. My “working guns” have gone into “harms way” with adjustable gas blocks and I know of many others that have.

If what you’re saying is that you wouldn’t advise a switchblock style that’s routinely moved from suppressed setting to unsuppressed setting and back again, I’d probably agree with that.

My most recent duty gun was built to my specifications, one of which was a gas port that I consider correct to begin with so that an adjustable gas block wasn’t necessary. That’s rarely an option, as the particular barrel a guy wants is rarely offered with anything other than the manufacturers standard gas port size, which is considered, by many discerning users, significantly over gassed. In these cases, the AGB makes a lot of sense.

 

[LeadZeke]

Typical appeal to authority. I heard all the same bullshit when optics and adjustable stocks were getting big 20+ years ago. "Unreliable, adding another failure point, introducing uneeded complexity, will never survive real combat!" And now of course everyone is using both all the time across the globe. The key to understanding this is that technology improves with time, as do designs and materials. Even in the last 5 years there have been a lot of breakthroughs. So yeah, the first red dots kinda sucked ass. So did the first adjustable gas blocks. A lot still do, and I have seen some of the cheaper designs fail, lock up, and come appart completely. Never seen that happen to a Superlative Arms though, not in 16,000 rounds thus far. Not even close, the design is such that is is basically impossible.

Simply put, with a good modern AGB (especially the SA blocks IMHO) you trade a bit of potential reliability for a lot of performance. Just like optics vs. Irons. Just like fixed stocks vs. adjustable. Just like match triggers vs. milspec. And so on. All worthwhile trades once the tech matures, and it certainly has with AGBs now (at least enough for them to be worth it).

And that "muh KAC GAS SYSTEM!!!" bs is such garbage. They used a slightly longer gas system with a slightly smaller gas port and then properly sealed it up. You can do that your fucking self. In fact I can go buy intermediate and even rifle gas 16in barrels right now, with properly sized gas ports. And I can then pressure fit a gas block and seal it up. It isn't complicated, and it isn't high tech, and it isn't special (unlike their bolt). It also doesn't work anywhere near as well suppressed and unsuppressed as an AGB. It works, but it could be less gassy when suppressed with regular rifle cans (like a SiCo Omega for example) have less fouling and port pop, and so on. Don't get me wrong, KACs are great guns and I'm glad they have the gas system they do and they were "doing it first" at least for .mil. But to pretend their gas system is anything but what I just described is either dishonest or ignorant, and to pretend it magically makes KAC rifles shoot suppressed as if it had an AGB again shows either dishonesty or ignorance.

 

[Pusher591]

If you have never seen an AGB fail you either need to go buy a lottery ticket or you have almost no experience using them. They all fucking fail under use in any reasonable sample size. Some are manageable with maintaince but the vast majority are a ticking time bomb waiting to happen. So when people like you say shit like this, it just tells me they are either incompetent or have so little experience they just don't know better. Ignorance is bliss.


20 years building and repairing small arms, all over the globe for the us gov both in uniform and out. I've probally put more rounds downrange in a combat zone than you have in your entire life. So save the bullshit for someone who doesn't know better. They have been tested extensively and always come up short.

Stop pretending like you have any idea what your talking about. You don't. You don't think KAC would be using them after dumping millions into R&D over the last 35 years? Instead of having to design a system that works reliably both suppressed/unsuppressed with both commercial and .mil ammo without overgassing the system. Why would they not use an adj gas block since that would solve the biggest issue?

Can you elaborate and explain what exactly fails on AGB’s? Honest question so please explain in detail what and how it actually fails. I’m extremely knowledgeable and vocabulary is fairly broad, so you don’t have to dumb it down or anything.

 

[Primus]

You really want me to list it? Do your own research.

An adjustable stock is not key failure point in a rifles gas system, nor is an optic. Your point is retarded.

There is nothing made that is reliable enough to trust your life to. SA, SLR, Seven, and the dozens of others have all proven to fail under heavy use. It's not even a debate, you just don't know any better.

Anyone can get something right once, but can you repeat it under the same conditions? Do it 5 times? 10? 100?. Just like everyone on the internet shoots 10 shot .25moa groups durring a hurricane with their $300 sps people claim the dumbest shit when it comes to round count and usage. That's why I don't care about your anecdotal claims.

 

[Evolution 9]

Primus,

Once again, you’ve resorted to ad hominem attacks rather than facts and reasoning. Looking back at your last several discussions in other threads, this is quite a pattern for you. I’m quite surprised the mods here have put up with it for so long.

You were asked a simple question. If you have the experience you claim, it will be simple to answer...

 

[newguy2k3v2]

Can you elaborate and explain what exactly fails on AGB’s? Honest question so please explain in detail what and how it actually fails. I’m extremely knowledgeable and vocabulary is fairly broad, so you don’t have to dumb it down or anything.

I'd like to hear as well. Obviously some seize up but that isn't going to down the rifle. If we're in danger of adjustable gas blocks kabooming I'd think it would be more common knowledge.

 

[Evolution 9]

He isn’t going to explain the supposed failures.

In this thread he has said:

“Bullshit”
“Shit”
“Fucking”
“you have no experience”
“they all fucking fail”
“people like you say shit like this”
“incompetent”
“ignorance is bliss”
“save the bullshit”
“stop pretending you have any idea”
“your point is retarded”
“you just don’t know any better”
“people claim the dumbest shit”
“I don’t care about your anecdotal claims”

His other recent activity on snipershide is similar.

Does that sound like someone who’s going to use sound reasoning, facts, and logic when questioned?

@padom is either super busy or one super chill moderator.

 

[MontanaMan]

You still don’t seem to understand how most adjustable gas blocks are used. Most are only adjusted once and left in place.

Non-sense, that defeats the purpose of having an AGB which is to optimize a given setup.

I can, & do, change my AGB settings for a variety of reasons from time to time & know what setting works with what setup & can easily return to a given setting.

And you really can't compare a "duty gun" for some non-military use, to a dedicated weapon to be used in high intensity, continual warfare situations either.................just sayin' .

And yes, I like AGB's & more than half of my dozen or so guns have them.

MM

 

[MontanaMan]

He isn’t going to explain the supposed failures.

In this thread he has said:

“Bullshit”
“Shit”
“Fucking”
“you have no experience”
“they all fucking fail”
“people like you say shit like this”
“incompetent”
“ignorance is bliss”
“save the bullshit”
“stop pretending you have any idea”
“your point is retarded”
“you just don’t know any better”
“people claim the dumbest shit”
“I don’t care about your anecdotal claims”

His other recent activity on snipershide is similar.

Does that sound like someone who’s going to use sound reasoning, facts, and logic when questioned?

@padom is either super busy or one super chill moderator.

Let it go...............it's just The Innanet.

If you like what you're doing then keep doing it & move on; can't take everything so seriously or you'll stroke out.

MM

 

[Evolution 9]

Montana Man,

My statement was correct, and therefore not “non-sence”. Most people use AGB in exactly the manner I described. Even the responses in this thread bear that out.

I fully agree that there are other ways to use them and some do.

If pointing out the unhealthy and unhelpful communication habits of Primus is going to make me stroke out, I’ve got much larger problems than gas block issues... thanks for the heads up. Gonna go consult with my Doc... and make sure the will is up to date ?

 

[Pusher591]

You really want me to list it? Do your own research.

An adjustable stock is not key failure point in a rifles gas system, nor is an optic. Your point is retarded.

There is nothing made that is reliable enough to trust your life to. SA, SLR, Seven, and the dozens of others have all proven to fail under heavy use. It's not even a debate, you just don't know any better.

Anyone can get something right once, but can you repeat it under the same conditions? Do it 5 times? 10? 100?. Just like everyone on the internet shoots 10 shot .25moa groups durring a hurricane with their $300 sps people claim the dumbest shit when it comes to round count and usage. That's why I don't care about your anecdotal claims.

That’s about the answer I expected...carry on

 

[Huskydriver]

If you have never seen an AGB fail you either need to go buy a lottery ticket or you have almost no experience using them. They all fucking fail under use in any reasonable sample size. Some are manageable with maintaince but the vast majority are a ticking time bomb waiting to happen. So when people like you say shit like this, it just tells me they are either incompetent or have so little experience they just don't know better. Ignorance is bliss.


20 years building and repairing small arms, all over the globe for the us gov both in uniform and out. I've probally put more rounds downrange in a combat zone than you have in your entire life. So save the bullshit for someone who doesn't know better. They have been tested extensively and always come up short.

Stop pretending like you have any idea what your talking about. You don't. You don't think KAC would be using them after dumping millions into R&D over the last 35 years? Instead of having to design a system that works reliably both suppressed/unsuppressed with both commercial and .mil ammo without overgassing the system. Why would they not use an adj gas block since that would solve the biggest issue?

Death before dismount? They have tankers working the arms room these days to accumulate all this combat small arms experience haha?

Lol seriously dude we get it your a kak fanboy and that's okay but kak is not the end all be all to ar's. I also have tons of sa agb with thousands of rounds on them with 0 failures. Doesn't mean it won't happen eventually but hasn't yet.

 

[Primus]

Bro I get hammered and race my sportbike around town without a helmet at night all the time wearing flip flops and a tank top. I have like 20k miles on it just doing that. There is nothing to worry about. You shouldn't wear helmets either they are for pussies.

That is how rediculous you sound.

On a technical note, why would you use an AGB if you never change settings? Just order a barrel ported to your spec and never have to deal with any of the negatives of an AGB. That would require intelligence and foresight, so nevermind.

This is where it's obvious who has does this shit for a living and who plays weekend gumplumber with a pile of psa parts and a copy of building ARs for dumbies.

 

[Huskydriver]

Bro I get hammered and race my sportbike around town without a helmet at night all the time wearing flip flops and a tank top. I have like 20k miles on it just doing that. There is nothing to worry about. You shouldn't wear helmets either they are for pussies.

That is how rediculous you sound.

On a technical note, why would you use an AGB if you never change settings? Just order a barrel ported to your spec and never have to deal with any of the negatives of an AGB. That would require intelligence and foresight, so nevermind.

This is where it's obvious who has does this shit for a living and who plays weekend gumplumber with a pile of psa parts and a copy of building ARs for dumbies.

We get it you operate with your kak slaying and stacking bodies American freedom wall high with thousands of rounds fired to your credit in action....

Still not apples to apples with your motorcycle analogy. One is clearly retarded and statistically increases your chance of failure while you have yet to show our prove all these agb failing in masses other than Rahhhh Kak rules and in my secret squirrel world nobody who kills people for a living would ever use an agb because kak didn't design it...

Lol seriously your argument is since army procurement didn't like it they are bad lol? Big army never cuts corners on its products?
I wanna know who thought the m3a scope was a good idea with it's retarded mil reticle and moa turrets I got issued.

 

[Evolution 9]

Just order a barrel ported to your spec and never have to deal with any of the negatives of an AGB. That would require intelligence and foresight, so nevermind.

Again, bluster... wind without rain.

Again, not able to explain the failure mode you claim you saw with regularity.

And again, you failed to read with any comprehension... I explained that ordering such a barrel with spec’ed gas port was something I sometimes do, and ALSO explained why that usually isn’t possible.

You keep stepping on your dick, man, here and in other threads. Your posts will be more accurate and received much better if you form your opinions with less emotion and more objectivity and then express them as if you’re in a discussion with friends, rather than an injured and cornered animal fighting for its life.

 

[Primus]

I said nothing about .mil procurement. You rambling on about something unrelated is not going to help your argument. If you read what was written these have been tested ad nauseum, and they fail. They fail enough that no one with 2 brain cells to rub together is going to out them on a duty rifle going into harm's way.

Stop trying to defend the in-defensible.

There is not one hard use DI gun used by anyone of note, that has an adjustable gas block. Nada. You don't think snipers and dms would love to have one for when they runs can/no can or switching between loads? Or guys who have to swap between frangible , AP and bonded soft core?

The problem is you are ignorant and just don't know any better. If you knew what kind of testing has been performed by various units, orgs and companies to try and come up with a better mousetrap, this would be obvious. They just rebuilt the block 2 sopmod and guess what....still no agb.

This is my last post in this thread. It's already been a waste of time.

 

[MontanaMan]

The entertainment value here for the price expended is HUGE................................




MM

 

[Huskydriver]

I said nothing about .mil procurement. You rambling on about something unrelated is not going to help your argument. If you read what was written these have been tested ad nauseum, and they fail. They fail enough that no one with 2 brain cells to rub together is going to out them on a duty rifle going into harm's way.

Stop trying to defend the in-defensible.

There is not one hard use DI gun used by anyone of note, that has an adjustable gas block. Nada. You don't think snipers and dms would love to have one for when they runs can/no can or switching between loads? Or guys who have to swap between frangible , AP and bonded soft core?

The problem is you are ignorant and just don't know any better. If you knew what kind of testing has been performed by various units, orgs and companies to try and come up with a better mousetrap, this would be obvious. They just rebuilt the block 2 sopmod and guess what....still no agb.

This is my last post in this thread. It's already been a waste of time.

Rightttt....

 

[Evolution 9]

The military doesn’t need adjustable gas blocks to correct over gassing because, unlike anyone here, they have the buying power to force any barrel maker they choose to supply them with whatever gas port size the government wants.

The rest of us are usually stuck with gas ports designed to run on the cheapest crap Bubba can find so he doesn’t report to the internet that XYZ brand uppers aren’t reliable. And again, this is why most guys that use AGB do. To solve this problem once and leave it.

 

[newguy2k3v2]

I said nothing about .mil procurement. You rambling on about something unrelated is not going to help your argument. If you read what was written these have been tested ad nauseum, and they fail. They fail enough that no one with 2 brain cells to rub together is going to out them on a duty rifle going into harm's way.

Stop trying to defend the in-defensible.

There is not one hard use DI gun used by anyone of note, that has an adjustable gas block. Nada. You don't think snipers and dms would love to have one for when they runs can/no can or switching between loads? Or guys who have to swap between frangible , AP and bonded soft core?

The problem is you are ignorant and just don't know any better. If you knew what kind of testing has been performed by various units, orgs and companies to try and come up with a better mousetrap, this would be obvious. They just rebuilt the block 2 sopmod and guess what....still no agb.

This is my last post in this thread. It's already been a waste of time.

So no specific examples, links or anything tangible, just a lot of hot air. Got it

 

[supercorndogs]

Cheep adjustable gas block vs having all my AR barrels custom built and ported for the load I develop for them.... I aint made of money.

 

[aslrookie]

I just think it’s funny guys prefer the adjustment screw to seize up. It’s basically a super expensive fixed gas block at that point.

Waiting for the hate to follow...

 

[supercorndogs]

So 20-50 is normal, 50-100 is "super expensive."

Go be poor some where else.

 

[Evolution 9]

Yes, but a fixed gas block that sets up your gun to run properly as opposed to badly over gassed.

No hate, but yeah, some of us want guns that run properly.

 

[supercorndogs]

Has anyone ever tried using feeler gauges to space the gas block away from the shoulder covering part of the gas port and adjusting gas that way?

 

[Evolution 9]

Has anyone ever tried using feeler gauges to space the gas block away from the shoulder covering part of the gas port and adjusting gas that way?

You’d have to move it a fair distance as the port hole is supposed to be centered in the (noticeably larger) gas block gas channel. This would move your whole gas tube forward and that would reduce the amount of time the gas tube is supplying gas to the carrier.

I’m sure it would work but you’d be messing with the system parameters in a way that I wouldn’t touch.

 

[Pusher591]

I said nothing about .mil procurement. You rambling on about something unrelated is not going to help your argument. If you read what was written these have been tested ad nauseum, and they fail. They fail enough that no one with 2 brain cells to rub together is going to out them on a duty rifle going into harm's way.

Stop trying to defend the in-defensible.

There is not one hard use DI gun used by anyone of note, that has an adjustable gas block. Nada. You don't think snipers and dms would love to have one for when they runs can/no can or switching between loads? Or guys who have to swap between frangible , AP and bonded soft core?

The problem is you are ignorant and just don't know any better. If you knew what kind of testing has been performed by various units, orgs and companies to try and come up with a better mousetrap, this would be obvious. They just rebuilt the block 2 sopmod and guess what....still no agb.

This is my last post in this thread. It's already been a waste of time.

This is your 6th reply to this thread and yet you still have not given a single instance of when one failed for you (since you do all this body slaying) and more importantly how exactly they are failing. Do you understand why your replies are not well received? You are coming in claiming/stating how they are inferior but haven’t given a single instance of when or how they have failed.

Your only reply was to me and that was “look it up”. A google search (multiple multiple pages of searching) only references the issues of carbon buildup around the adjustment screw which has been covered. Not a single search engine has given me information as to AGB’s “failing”.

How about put all this other talk aside and answer the question of how these AGB’s are failing and give a mechanical explanation as to why.

 

[supercorndogs]

You’d have to move it a fair distance as the port hole is supposed to be centered in the (noticeably larger) gas block gas channel. This would move your whole gas tube forward and that would reduce the amount of time the gas tube is supplying gas to the carrier.

I’m sure it would work but you’d be messing with the system parameters in a way that I wouldn’t touch.

I suppose I should have started a new thread rather than asking here. I would think 1/8" would start covering the hole. But I don't know how critical the amount of gas tube going into the key is. One of several reasons I never tried it, but the thought passed through my head.

 

[MontanaMan]

The rest of us are usually stuck with gas ports designed to run on the cheapest crap Bubba can find so he doesn’t report to the internet that XYZ brand uppers aren’t reliable. And again, this is why most guys that use AGB do. To solve this problem once and leave it.

There really are barrel suppliers that either publish the port sizes or will tell you what they are if you ask (assuming you know what you want or need & that's a BIG assumption).

No need to buy cheap, lousy, highly over-gassed barrels from someone who cannot or will not supply that info.

And don't take that to mean that I don't like AGB's because I do.

YMMV

MM