Compatible Upgrade Optimus Defense Lower Receiver Jig "TiN" Coated Drill Bit Kit How to Build AR-15 &

How to Build AR-15 & AR-10

5" OAL and 1/8" ShankCoated with our proprietary "F55" coating for extreme hardness and lubricity for longer tool life

6 Pack    19/64" "TiN" Coated High Speed Steel Drill Bit

5/32"  3/8" "TiN" coated high speed steel drill bits

Upgraded Lower Receiver Jig Tooling Kits

Compatible Upgrade Optimus Defense Lower Receiver Jig "TiN" Coated Drill Bit Kit How to Build AR-15 &AGT's Kits are A Significant Upgrade to all kits on the market "TiN" Coated high speed steel drill bits, custom cut to our specifications. OptimusDefense. com compatible Lower Receiver Jig "TiN" Bronze Oxide coated high speed steel drill bit kit. 100 % American Made. Simply the best drill bits. Replacement End Mills Replacement Drill Bits Optimus Defense Lower Receiver Jig Tooling Kit