Compatible Upgrade Optimus Defense Lower Receiver Jig "TiN" Coated Drill Bit Kit 5" OAL and 1/8" ShankCoated

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

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

Because customers approached us looking for a more economical tooling

308 Lower Receiver and many more Jigs

Upgraded Lower Receiver Jig Tooling Kits

Compatible Upgrade Optimus Defense Lower Receiver Jig "TiN" Coated Drill Bit Kit 5" OAL and 1/8" ShankCoatedAGT'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