A must have item for properly aligning and securing gas blocks!! SLR jigs are available in .625, .750, .875, and .936 diameter. .

5  spacing for blocks with  .400" .425" .450"  .470" and .500" center to center

Includes Jig , Hardened Centering Screw and Custom Hardened Drill bushing

5/32" drill bit required.

7075 Billet T6 Aluminum 

5 position flats for Vice mounted drilling to keep barrel stable

Drill bit and Allen Wrenches available separately 

• Numbers on Jig face the front (towards muzzle) 

• Spacing to be used goes on DIMPLE side with drill bushing (opposite gas port)

• If using one dimple only, always dimple under gas port