Pin it like a pro! - Griffin Armament Primo Gas Block 416R Crucible Alloy

This Griffin Armament gas block makes it easy to drill the correct hole to pin it to the barrel like a mil spec one is so it will not back off when you need it most. I Used a drill press and it made easy work of the drill chore. Be sure to use a top notch coated drill bit because the barrel will be very hard. I will be ordering more of these.