AR-10 Bolt Carrier

Nosferatu · Apr 17, 2023

Who's making the favored AR-10 Bolt Carrier these days?

P7M13 · Apr 17, 2023

I have Aero & Toolcraft nitrided, Brownells phosphated (whoever makes them), and a JP full mass nitrided.
Shooting them, I cannot tell the difference. Examining them, the JP was far above the others in fit, finish and smoothness of operation.
There's a crap-ton of other brands. Just go to Primary Arms and search 308 BCG

Nosferatu · Apr 17, 2023

Yeah, I did that already, which prompted me to inquire from those that keep up with this stuff to see if there are one or two that rise above the rest.

JP seems like pressing the easy button! (An expensive easy button, nonetheless!)

solv3nt · Apr 17, 2023

Nosferatu said:
Yeah, I did that already, which prompted me to inquire from those that keep up with this stuff to see if there are one or two that rise above the rest.

JP seems like pressing the easy button! (An expensive easy button, nonetheless!)

JP. I've got their AR9 upper and bolt coming.

TTSX · Apr 17, 2023

I bought a ballistic advantage BCG recently. Seems ok, though I'm a little annoyed it's not marked with MPI/HPT like the advertisement said it was. They certainly did fire something with it, though given brass in the face so I'm inclined to believe it's as advertised. Time will tell. My headspace gauges for 6.5 CM just arrived in the mail so I'll get to see how that goes

I also have a nitrided aero in my .308 18" which has handled the job suppressed for a few hundred just fine. That one headspaced VERY tightly with a faxon barrel.

Nosferatu · Apr 17, 2023

TTSX said:
I also have a nitrided aero in my .308 18" which has handled the job suppressed for a few hundred just fine. That one headspaced VERY tightly with a faxon barrel.

I have the exact same combo and had the same tight headspace. With my M5 lower being so out of spec, I'm staying away from Aero for parts.

Could be Faxon problem as well, I suppose. I'm not using their barrel, not that they have a .25 chambering anyway.

TTSX · Apr 18, 2023

My BA BCG headspaces great with my BA 6.5 barrel. Its snug but not tight on a GO and won't close on a NO GO so I'm happy with it. Also turns out my BCG is chrome lined on the inside and the gas key so that's a nice bonus. Don't think it was advertised to be.