The BRDE gas block drilling jig D is used to drill, Troy, Aero Precision, Ballistic Advantage, Radical Firearms and CMMG 0.750" bore gas blocks for pinning.
Cold rolled carbon steel
Waterjet and hand fit opening
Manganese Phosphate finish
#31 drill hole
Includes 1/4"-28tpi x 3/8" soft point set screw
Includes one #31 jobber drill bit and 1/8" hex key