NFA newbie- dedicated suppressed 11.5" build questions

[Magic_Salad0892]

Magicsalad, do you know the gas port size of a BCM 11.5" SS barrel? I'm running an A5 and an AAC 7.62 on it's locking back with wolf steel case, XM193, etc...

Just want to know for the future, as I'm loving this barrel length.

I think it's .071'', but I can't confirm.

[RyanB]

I'm using a 10.8" barrel with a Ranger 2 and a .063 port. Using an H3 or A5 barrel it seems overgassed even with Wolf. Certainly with XM193.

With a regular ported 11.5... X buffer probably. 7.6 ounces. Or the heaviest of the A5s.

[Iraqgunz]

Around .076.

I think it's .071'', but I can't confirm.

[markm]

Got it.

You should try and make a .060 suppressed companion video to the .070 un-suppressed one.

I will. I'll film something this weekend. We might have the parts to test one of our Bergara barrels too.

[fixit69]

Thanks guys, appreciate the info, and gives me an idea...

[Magic_Salad0892]

Around .076.

Thanks for the correction, IG.

Where'd you get the measurement though?

[Iraqgunz]

Ancient Chinese secret.

Thanks for the correction, IG.

Where'd you get the measurement though?

[Rodman24]

Ancient Chinese secret.

You used Calgon?

That brought back some memories. And made me laugh.

[markm]

You used Calgon?

That brought back some memories. And made me laugh.

He meant that BCM's line is all chinese made... so you clowns quit buying the product and leave some inventory for me to buy!

[Eurodriver]

Going off information given by Surf, I bought a 16" carbine length DD barrel and had it cut and threaded by ADCO to 10.3" without gas port work. I believe gas port size is around 0.062" I researched this issue for months and that was pretty much the only way to go about getting a small gas port unless its custom made...some would argue that even 0.062" is too big.



I need to get around to making a video, but this is the smoothest shooting suppressed AR I've ever shot. It has the small gas port, AAC Brake, and an A5 buffer system.

My 12.5" and any 14.5/16" ARs (Even mild shooting BCM 14.5" Midlengths) all eject violently and almost uniformly to the front. I know some might call foul, but if I had never shot this rifle I wouldn't say a 14.5" Colt suppressed was very "violent" either.

My brass always tends to land at my 4:00 in a neat little pile, its extremely smooth and gas face is almost non existent.

The downside, of course, is that the rifle turns into a single shot if you remove the suppressor. No free lunch. But it feels like a BB gun with absolutely no felt recoil - at all unsupressed.