Use of the BRDE gas block dimple jig:

1. Slip the jig onto the barrel and using the pointed set screw to screw into the gas port in the barrel. The pointed set screw will self center the jig on the barrel. This screw just needs to be snugged down

2. Install the soft point set screw in the 2nd hole, this screw can be tightened down.

3. Flip the assembly over and use a 11/64" bit in a drill to start the dimples.

4. Now the jig can be removed. It can be used as a barrel holder when using the soft point screw. Pictured below is the dimples started. 

 5. Next the dimples are opened up. Maximum size should be the OD of the drill (11/64") and depth of the point. Less OD and depth is okay also.

6. Now the gas block can be installed on the barrel. Line up with the dimples and install one set screw with appropriate thread locker, such as Loctite 272. Snug up. Install the second set screw and snug up. Torque the screws to the manufactures specifications.

**Note: due to manufacturing variations, the gas block may appear slightly canted when assembled under a handguard. I have found that this is typically caused by slop between the upper and alignment pin.