AR gas block/sight base

Bcwitt

Bcwitt

Member
Joined
Dec 22, 2020
Messages
1,711
Location
Pennsylvania
Have a post ban A2 that i would like to install a pre ban type gas block (w lug). Is there a drill fixture that will align the new base w the existing pin holes in the barrel? Rifle is a 90s vintage Bushmaster.
 
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