2AUMK3 Universal drilling jig
1AUMK2 Universal dimple jig with sleeve for 0.625" barrels
2 - Extra soft point set screws for drilling jig
2 - Extra sets of set screws for dimple jig
1 - Drill bushing
1 - muzzle block
1 - long 3mm carbide end mill for starting holes on gas blocks
2 - #31 HSS drills
2 - 11/64" HSS drills
1 - #31 Carbide drill
1 - 11/64" Carbide drill
1 - 0.1247" chucking reamer
10 - 1/8" x 5/8" 416 SS heavy duty coiled roll pins
The 2AUMK3 is the newest iteration of our universal pin drilling jigs. It is for 223/556 barrels and has drilling positions for all four common gas block journal sizes (0.625, 0.750, 0.875 and 0.938). It is adjustable axially to accommodate any gas system and pin location. The drill bushing is also adjustable and held with a set screw.
When set up the beam will need to be checked for square, as pictured, since the beam is a slip fit in the block.