Suppressors AR10 suppressor question

T

Tackleberry

Sergeant
Full Member
Minuteman
Dec 16, 2005
890
25
possumneck, ms
#1
I have a 16" ar10 and want to use my can on it. My other ar10 has a gas block that switches from suppressed to unsuppressed. Do I have to change the gas block on this on or can I just screw the can on and go shoot? Both guns are armalites
Thanks
 
#2
Re: AR10 suppressor question

You can put it on there but your recoil impulse is going to feel more violent. You will see more blowback and gas to the face then running a setup with an adjustable gasblock.

I do it on my gap10...... wont hurt anything
 
#3
Re: AR10 suppressor question

You will also occasionally get a stove-pipe or failure to eject because of the increased bolt velocity.

I suggest a Slash heavy buffer. It cures this problem and works non-suppressed as well. He offers buffers for carbine or rifle buffer tubes.
 
#4
Re: AR10 suppressor question

I agree with the other gentlemen and will add that the increased back pressure can also result it premature parts wear and/or breakage. In particular I've seen several bolt catches break specifically on Armalite rifles running suppressors without modification to the rifle. Adding a heavier buffer "fixed" the issue in these cases.

The other point I'll make is that some suppressors create greater back pressure than others. They all will add some pressure but designs that mount back over the barrel a bit (e.g. some models from Ops Inc, SureFire and AAC's SCAR-H SD) typically have less blow back. I only mention this so when you are getting information from other people regarding their setups you keep this in mind since it can affect results/performance.

Remember we love pictures around here so don't be shy with your camera.
wink.gif


Mark
 
#5
Re: AR10 suppressor question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BookHound</div><div class="ubbcode-body">I agree with the other gentlemen and will add that the increased back pressure can also result it premature parts wear and/or breakage. In particular I've seen several bolt catches break specifically on Armalite rifles running suppressors without modification to the rifle. Adding a heavier buffer "fixed" the issue in these cases.
Mark </div></div>

Mark is right on. I just broke a bolt stop yesterday running an AAC Cyclone. I have an adjustable gas block and it was turned almost all the way off on checking only 1/4 of the gas port was open one would think that should have done it but nope so I see a HEAVY buffer in my future. I have also tried Tubb carrier inserts without success still way to violent.
 
#7
Re: AR10 suppressor question

This is a weak spot overall in the industry right now. Armalite has their proprietary switchable block, but will only sell it complete with HG. Since I won't own an Armalite upper, their HG does me no good.

Noveske has a patented one but in 308 they only sell it with complete barrels.

KAC has modified the buffer and bolt and state that they do not need a selectable anything between suppressed and unsuppressed.

I have the PRI adjustable, but it is not selectable. It is meant to be adjusted, loc tited, and left alone. They have a design for a selectable but have not brought it to market.

JP's is the same as PRI- set it and leave it alone. Not selectable.

If you come up with something else, please let us know.
 
#8
Re: AR10 suppressor question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: typhoon186</div><div class="ubbcode-body">Will a muzzle break incease back pressure also? </div></div>

If they do which I doubt it would be VERY minimal and nothing to be concerned about.
 
#9
Re: AR10 suppressor question

my other armalite is a SASS and has a switchable gas block. I have only fired it suppressed and never had an issue. It sounds like I need to be on the phone ordering a heavy buffer. I will continue to watch over the weekend to see what other suggestions there are. Thanks for the help!!
 
#10
Re: AR10 suppressor question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: _9H</div><div class="ubbcode-body">

Noveske has a patented one but in 308 they only sell it with complete barrels.

</div></div>

Noveske does not have a .308 switchblock as of yet. I spoke with Joel a few years ago and he indicated that they may come out with one in the future, but as for now, their are none available.

Running my Noveske AR10 suppressed compared to my M110 at work, the AR10 seems to be a lot less over-gassed; by that I mean that I do not get a face full of crap when I am shooting my AR10 suppressed as I do when I am shooting my M110. The Ar10 seems to get dirty at a slower rate too. This all could be due to my AR10 only having 700 rounds through it and the 110 having 2,000+ rounds down the tube, either way my AR10 is much more pleasant to shoot.

Anyways, Armalite does sell their adjustable gas block separate from the SASS rifle, but you would have to by it with the hand guard, it is for rifle length gas systems .875
 
#16
Re: AR10 suppressor question

Since I am a bolt gun guy and not very experienced with a gas gun I am going to take a stab that this would be recommended for my ar15 as well. Add a beefed up bugger tube and gas buster charging handle to both ar15 and ar10?
Thanks
 
#17
Re: AR10 suppressor question

I'm not a fan of the PRI gas buster charging handles as they seem to be more susceptible to breaking at the roll pin. If you want to address blowback, try adding a gas vent. This little part replaces the forward assist assembly and provides a channel for the gas to be redirected out of the receiver and away from your face. Doesn't work if you're a south paw though. A very cheap method of reducing/redirecting blowback is to RTV your charging handle where it meets the receiver.
 
#18
Re: AR10 suppressor question

For some reason I have not had gas blow back in the face problems in either my suppressed 21" AR10 or 10.5" 5.56 SBR. Mine dump's all the crap through mag well. An Adams Arms piston kit on the SBR helped a little but not much. AAC Cyclone screw on for the AR 10 and M4-2000 QD on 5.56. I'm a southpaw for whatever that's worth. Per other posts I found bolt lube is important.
 
#21
Re: AR10 suppressor question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: _9H</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mark S</div><div class="ubbcode-body">PRI sells a nice one I run one on my Noveske barreled AR10.
http://www.pri-mounts.com/mm5/merchant.m...ry_Code=308_ACC </div></div>

As I pointed out earlier, it is adjustable, not selectable. It is to be set and left alone. </div></div>

Select's faster than I can take suppressor off or put on. 2 turn's in for suppressor two turns out without. I do however get your point.
 
#22
Re: AR10 suppressor question

Yes, and it can come loose and move on its own while firing, and the threads can get caked with carbon and then not be turned in to reduce pressure -

For it to be field/battle reliable, it needs to be set and left alone. That is coming directly from PRI's designer/tech guy.
 
#23
Re: AR10 suppressor question

Any of the set-screw adjustable gas blocks need to be rocksett'd or staked once they're set up right. Otherwise there is a decent possibility they'll get loose and fly out. The AR-10 is overgassed so much it still "almost" works with an adjustable screw missing.. don't ask.
 
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