Armalite AR10-B uppers

[James BSeries]

I'm new to this building a gun AR , So I ask a stupid question. Will any Bolt Carrier work in the B upper Receiver.

i know there are differences in the Bolts an Barrel Extensions, an you cannot mix Bolt Carriers an Bolts. I know the two difference patterns.

so what about the cycling of the BCG in the upper

[98Z5V]

Any Armalite AR-10 BCG will work in it.  Their BCGs never changed.  

What barrel are you running?

[James BSeries]

The BCG is a Rubber City Armory # 3HP-001 with the DPMS Bolt, Ordering a X-Caliber 308 DPMS Barrel Extension , 24 inch, 

875 gas port, 5/8 24 threads. Jeff Larson At Rubber City think I will be ok with this set up . Do you have any input on my build you can share.

[James BSeries]

Yes I'm sending the Bolt to x-Caliber for correct head spacing.

[98Z5V]

6 hours ago, James BSeries said:

 Do you have any input on my build you can share.

Yeah, I have a ton of input, but the bottom line is, it should work.  I wouldn't put all your eggs in one basket on your barrel manufacturer, but that's my opinion.

I have full Armalite AR-10 guts running inside Aero Precision M5 receivers, and it's badass - so I know that of the cross between the two platforms (Armalite and DPMS-based) is done right - then they work right.  Nutshell version, right there. 

Be ready to run Armalite AR-10 mags that work in the 10B platform.  Mags that typically run in the 10A platform will not work.