Obviously I'd recomend measuring the barrel with calipers, but when doing a search fo "AR 10 Bull Barrel Gasblock" .936 is what I come up with everytime. If the barrel was a custom size the custom gas blocks etc. would have to be used.
Here is the compensator I am going to get my bull barrel threade for.... JP Tactical Compensator .223 cal Bull Barrel. They make the same one for a .308 in both stainless and black. You can look them up on nokick.com.
"No free man shall ever be debarred the use of arms. The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government"
-- Thomas Jefferson, 1 Thomas Jefferson Papers, 334
Last edited by TexasGunner; 03-11-2013 at 07:24 PM.