2AUMK4 and 1AUMK2 Bundle

Initially this is a made to order item. Please allow 7-10 days to ship.

This is the latest iteration of a universal gas block pinning jig. It is designed to work with any gas block using #10 set screws. The jig includes two 1" long 10-32 set screws and utilizes a slotted steel body with and fabricated steel drilling arm. This kit includes two drilling arms, one with a #31 drill bushing and one with a 5/32 drill bushing. 5/32" is the standard pin for the Geissele gas block. #31 provides a base hole to ream to fit 1/8" diameter coiled roll pins, 1/8" dowel pins or 2/0 taper pins.

This jig will work on any gas block using a #10 set screw, including all standard gas block sizes (0.625, 0.750, 0.875, 0.938)

Kit Includes:

Kit Includes:

1AUMK2 Dimple Jig

2AUMK4 Gas Block Drilling Jig

Qty 2 - 11/64" HSS stub drill

Qty 1 - 11/64" Carbide stub drill for nitride barrels (dimpling)

Qty 1 - 3mm carbide end mill for starting holes on gas block

Qty 2 - #31 HSS drill 

Qty 1 - #31 Carbide drill for nitride parts (pinning jig)

Qty 1 - 0.1247" Dowel pin chucking reamer

One set of replacement set screws for the jigs

Quantity 10 - 1/8" x 5/8" 416 SS heavy duty coiled roll pins