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flash hider

The Mall Ninja

Sergeant
Full Member
Minuteman
Nov 1, 2008
422
8
North Pole, AK
I have a few questions about my AR's flash hider. My Noveske upper came from Noveske with a Smith Vortex installed on it. One of the things I was wanting to know was, if I were to get it removed and had an AAC 51T Blackout installed (same thread pitch for both) would I need to have my barrel turned down anywhere in order to accept it or a suppressor? Another question I have is, Once I got a sppressor for my AR, would I need to change out the buffer if I'm shooting out of a 14.5 inch barrel? Almost lastly, this kinda fits in with my last question, would i need an adjustable gas-block for my upper or would it cycle OK with out one? And finally, Is there anything else I should change out to better accomidate fireing with a suppresor?
 
Re: flash hider

You need to ask someone that really knows suppressed weapon systems. The Smith Vortex is an excellent flash suppressor. If you have a 14.5 in barrel is the suppressor pinned on as a permanant attachment less than 16 in is in violation of Federal Law and requires one register the weapon Class III as a short barrel rifle. You could unknowingly create yourself a huge problem by removing what is making the barrel 16 inches and placing something a quarter inch too short on it so be knowledgable about Length. Adding a suppressor would probably add additional back pressure. I think Rancid Coolaid has some suppressed rifles you might send him a PM and ask his advice.
Just be careful not to get into a problem with barrel length.
 
Re: flash hider

I know about the barrel length regs, and if installing the 51T my barrel will be at 16.25 in long. The questions were mainly aimed at those out there in the "Hide" that have expieriece with AAC's flash hider/ suppressor mount, and their suppresors
 
Re: flash hider

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Kahlendrrari</div><div class="ubbcode-body">I have a few questions about my AR's flash hider. My Noveske upper came from Noveske with a Smith Vortex installed on it. One of the things I was wanting to know was, if I were to get it removed and had an AAC 51T Blackout installed (same thread pitch for both) would I need to have my barrel turned down anywhere in order to accept it or a suppressor? Another question I have is, Once I got a sppressor for my AR, would I need to change out the buffer if I'm shooting out of a 14.5 inch barrel? Almost lastly, this kinda fits in with my last question, would i need an adjustable gas-block for my upper or would it cycle OK with out one? And finally, Is there anything else I should change out to better accomidate fireing with a suppresor? </div></div>

First off, UrImaginaryFrnd makes a highly valid point about legal barrel length. If you currently do not have a tax stamp for the rifle and wasn't required to get one, the current FH is most definitely pinned on. Secondly, the AAC suppressor that is compatible with the Blackout does not extend beyond the back of the adapter, so there is no need to turn the barrel as with SF setups. Provided that the rifle is fully functional now, there is no real need to make any buffer or gas block changes with the use of a suppressor.
 
Re: flash hider

the flash hider is perm. installed, and i was going to send it to ADCO to get the vortex removed and have them perma install the 51T. just been reading around some other forums and those guys were talking about changing out this and that (like charging handle, gas block) i don't know if they did it for shits and grins or they were tired of getting hit in the face with hot exhaust gases due to the suppressor. this is my second rifle, my first semi auto, and i just want to do things right, and not regret it later like i did with my bolt gun.
 
Re: flash hider

Why not put an adjustable gas block on it while you're having the FH changed and not worry about it? I don't think it could hurt if you're going suppressed. Then at least you have the option of adjusting to different ammo.
Just a thought.
 
Re: flash hider

If ADCO is going to pull the Vortex and Perm the BlackOut then you will be fine as far as length goes.

I run a M4-1000 on my rifle .... I have no probs at all and dont need an adjustable gas block or anything like that. I did however add a gas buster CH, to help direct gas but thats the only thing I added other than a BO mount for my can as well.
 
Re: flash hider

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Kahlendrrari</div><div class="ubbcode-body">the flash hider is perm. installed, and i was going to send it to ADCO to get the vortex removed and have them perma install the 51T. just been reading around some other forums and those guys were talking about changing out this and that (like charging handle, gas block) i don't know if they did it for shits and grins or they were tired of getting hit in the face with hot exhaust gases due to the suppressor. this is my second rifle, my first semi auto, and i just want to do things right, and not regret it later like i did with my bolt gun. </div></div>

An adjustable gas block is a "nice-to-have," but it's not a show stopper. Your rifle will function without going to an adjustable and I've not experienced a failure to function with any of the ammo I've shot. My preference is a CMMG gas piston system, doing away with direct impingement altogether. I recently built an M4 using Colt upper and lower with the piston conversion and it fucntioned flawlessly with the suppressor. As far as any of the seemingly thousands of other components available, it's a matter of choosing wisely. Typically in a semi-auto, the simple approach is the most reliable.
 
Re: flash hider

You shouldn't have any problem with your rifle cycling suppressed if it was working properly before. The adjustable gas blocks/tubes/pigtail tubes/switchblocks, etc. are really not necessary. I have a gas buster on my suppressed AR, but found no real difference with or without it. I've also heard a small bead of RTV around the top of a regular charging handle will accomplish the same thing.
 
Re: flash hider

Agreed. I haven't found a great need for an adjustable gas block with a suppressor. When building a Match rifle and wanting to reduce recoil forces and/or tune to a specific load, they're great to have. I've also found the cyclic rate reducer to be very useful. I take a simpler approach when it come to sights/optics on an M4. A nice trigger is also a must....
 
Re: flash hider

The only suppressed weapon I have had was a Mac 10 .45acp with sionics suppressor and two tax stamps and while I would love to have a suppressor for one of my rifles I just wont ever buy anything class III again because of the crap I went through with BATFE. There are some really obscure laws be sure to notify them when you change address and be seriously aware of laws regarding taking it out of your state they have no sense of humor.