Ar-10 bbl question

krw

krw

Sergeant
Full Member
Minuteman
Feb 28, 2004
1,437
398
Arkansas
#1
I have a POF, P-308 AR. It has 16” 308 bbl. I want to change to a 20” 6.5CM bbl. I know there are 2 patterns of AR uppers. My question, do all AR-10 barrels interchange?
Would like to have a complete upper but cannot find one like I have on now. Thks
 
#2
The DPMS pattern barrel extension is the most common. This translates into many 308 AR barrel options. RRA LAR 308 will also work with a DPMS barrel.
The Armalite AR-10 barrel extension is not dimensionally identical to the DPMS.
Therefore Armalite AR-10 rifles must use barrels designated for the Armalite AR-10 and vice versa.
 
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#4
Just to tag on to OP's question, any idea which style SIG AR-10 uppers use for their barrels, like to replace the SIG barrel on mine.
 
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