The Gas Tube Counter Bore Drill is our GW Armory step drill for drilling the gas tube hole and c’bore in one shot on the AR-15 upper reciever.
Gas Tube Counter Bore Drill
2 Fl, 30 HLX | Ø.1845 | 118 DEG. INCL. POINT | .375 IN. SHK |9.0 IN. OAL | CARBIDE DRILL
End Type: Square End
Length of Cut: 0.9
Cutting Diameter: 0.1845