11.5" Barrel Optimum Gas Port Size

[Clint]

Yes, just about any 7.62 suppressor with a 5/8-24 mount will work.

There are a lot of good 30 cal suppressors available these days.

Q
Sig
SilencerCo
Rugged
Dead Air
AAC
Griffin

These are all suitable, especially in the shorter lighter versions geared towards 300 BLK applications.

A large portion of the innovation in the suppressor industry is currently centered around 30 cal applications.

[Clint]

There are several 5.56 suppressors that have 5/8-24 QD mounts available for them.


The 5/8-24 AAC 51T mount works with the M4-2000, 556-SD and Mini-4.

The 5/8-24 SilencerCo ASR Mount works with the Specwar 556, Specwar 556K, Saker 556, Saker 556K.

The 5/8-24 Griffin Taper mount works with the Reece 5 and Optimus Micro w/ optional taper mount interface.

There may be others.


In addition, several of the modular 7.62 suppressors have dedicated 5.56 End Caps available.

-Rugged Surge, Razor, Micro30 End Cap

-SiCo Saker, Omega, Hybrid End Cap

-DeadAir Sandman End Cap

-Griffin Optimus End Cap

[WS6]

I just dont understand eliminating a ton of suppressors for the sake of something that's never been shown to be an issue except in theory or extremis (torquing muzzle devices to 100#, etc)

[tom12.7]

I just dont understand eliminating a ton of suppressors for the sake of something that's never been shown to be an issue except in theory or extremis (torquing muzzle devices to 100#, etc)

There's a lot more to it than just that. 1/2"x28 just isn't best baseline, hindsight is always 20/20.

[1168]

I just dont understand eliminating a ton of suppressors for the sake of something that's never been shown to be an issue except in theory or extremis (torquing muzzle devices to 100#, etc)

I can’t think of many suppressors I would want today that wouldn’t work with these barrels. Maybe some older ones, so I can certainly see your point if you already own a non-compatible can. However, Sionics RGP is still an option for those.

Btw, @Clint, I decided to hold off on this barrel because I saw that y’all have gas tubes now, and I’m considering using one on a 10.3 instead of the 11.5 plus insert we discussed. More to follow when I make up my mind.

[WS6]

There's a lot more to it than just that. 1/2"x28 just isn't best baseline, hindsight is always 20/20.

What problems have actually been encountered? Not just in theory or in the drawing room, but actual observable issues in absence of material and manufacturing error?

[tom12.7]

Openly known are the harmonic radius issues that can come up, among others. We would probably rethink some things now, like 5/8" diameter gas blocks with less mass and different retention for the lighter barrel profiles.
Think of what type of defection curve you would get from a whip if you reduced the diameter at the end and added more mass on top of that.
1/2-28 isn't really that bad on its own with an A1/A2 flash hider, its what we can add to that for the above example. We can balance out extension and compression better with the larger diameter thread and look into another way to get a better end goal for possible options.

[Zane1844]

How are the 11.5” KAC mod 2 barrels? I’ve read mixed claims that their gas ports are smaller, or that they’re standard spec. I’d assume with their newer gas system that they could get away with a smaller port.

[Furbyballer]

How are the 11.5” KAC mod 2 barrels? I’ve read mixed claims that their gas ports are smaller, or that they’re standard spec. I’d assume with their newer gas system that they could get away with a smaller port.

Mine runs like a champ, but is very gassy when suppressed with a KAC QDC can. I can't imagine that it has a smaller gas port.

[tom12.7]

Unless KAC is doing something differently now, all of my KAC 11.5" barrels from earlier on through MOD 2's have been ported on the leaner side than other offerings. I prefer their porting over most others, they have been my go to recommendations for a lot.