80% AR15 Lower 5D Tactical Jig Review
Place the drill guide between the side plates with the "2" facing the front of the jig (though it only fits one way). Align the screw holes in the drill guide with the recessed holes in each side plate and install the four 8/32" screws. Using a 3/16" Allen (hex) head wrench install the largest 2" screw into the side plates.