Toolcraft .223/5.56/300 BLK M16 Profile Bolt Carrier Group Black Nitride - $79.99 With strength in mind, Toolcraft made their Bolts from heavy duty 9310 Alloy Steel and their Bolt Carriers from 8620 case-hardening aircraft grade steel. 9310 steel has a high core strength rating, high fatigue

Toolcraft Black Nitride M16 Bolt Carrier Group 158 MPI - $92.05 Toolcraft Black Nitride Bolt Carrier Group - 158 MPIThis black nitride BCG from Toolcraft is a popular choice for AR-15, M4 and M16 builds due to its mil-spec design and lifetime warranty. The bolt is made from 158 steel while the

Toolcraft Black Nitride 7.62X39 Bolt Carrier Group - 7.62X39 - $95.91 This Toolcraft 7.62x39 complete AR BCG comes with an enhanced firing pin to reliably ignite hard Russian primers and is perfect for steel cased surplus ammo. Mil-spec extractor spring, black extractor insert, Viton O-ring Tool

Toolcraft Black Nitride (458 SOCOM) Bolt Carrier Group MPI - $95.91 This 458 Socom black nitride BCG from Toolcraft is a popular choice for AR-15, M4 and M16 builds due to its mil-spec design and lifetime warranty. The bolt is made from enhanced 9310 steel while the carrier is made from 8620 tool

Toolcraft .223/5.56/300BLK M16 Profile Bolt Carrier Group - Black Nitride - $69.95 With strength in mind, Toolcraft made their Bolts from heavy duty 9310 Alloy Steel and their Bolt Carriers from 8620 case-hardening aircraft grade steel. 9310 steel has a high core strength rating, high fatigue

Toolcraft Black Nitride (6.8 SPC) Bolt Carrier Group MPI - $70.65 Toolcraft Black Nitride 6.8 SPC Bolt Carrier Group - MPI This 6.8 SPC or 224 Valkyrie black nitride BCG from Toolcraft is a popular choice for AR-15, M4 and M16 builds due to its mil-spec design and lifetime warranty. The bolt is made