Ar15 and Suppressors?

[BigBear]

What's the story? Do you need a special AR to run a suppressor? I keep reading about gas blocks and different settings and gas blowback when running suppressed, etc. I'm a little confused now. Help me out?

[Great-Kazoo]

It's really dependent on the rifle. Like ammo out of 2 identical AR's, grouping differently. So do some don't require changing buffer, maybe a heavier spring. Others choose to go the adj gas block route. This way they can tune gas system. It also depends on how large or small the gas port is on said rifle.
There's no cookie cutter method for AR's across the board.

Circuits probably runs his differently than MarkCo. Whereas Monky has done nothing but shoot his. For the few AR's i use here. 1 SBR is an adams arms piston, the 20" an adj block, 18" middy a noveske adj block. the spouse's SBR nothing changed outside running a H3 (heavier) buffer.

[brutal]

My few AR's which include lengths of 11.5, 14.5, 16, all run great without mods. All have/had appropriate buffers and well tuned gas lengths, carbine on the shorts, mid on the long.

I do get gassed, but that's expected.

8.5" AAC 300BO ran subs and supers first and every time without mod. This one doesn't really even gas me running supers.

Guess I got lucky on these.

The first Sig 716P (piston) would not run suppressed (AAC can). Known issue = design Flaw. Sig replaced the gun with a Gen2 that runs like a champ. Now, of course, there's a Gen3 and expanded model lineup.

[BigBear]

So there's not really a special line or any specific mod one needs? It's just a shoot in if you might need to upgrade the buffer or tune the gas port, etc? Ok, I think I understand.

[Colohunter]

Exactly, I shoot my Omega on a stock Bushmaster that I can't modify. The suppressor changes the ejection pattern, makes the brass and action much dirtier and I get some gas to the face, but it still functions just fine. If you shoot suppressed a lot and have the option to add a adjustable gas block, it would definitely be preferable, but not a necessity.

[J]

Yep. Just thread it on and shoot it. None of my ARs have needed any mods to run a suppressor.

The Pri gasbuster charging handle, or the do it yourself version of it with RTV is a really nice addition though. Keep you from eating so much burnt powder.