Toolcraft Phosphate 158 Bolt Carrier Group - MPI Bolt - M16 CarrierThis Toolcraft MPI inspected 158 Phosphate BCG comes with a lifetime warranty and is perfect for any AR15, M4 or M16 Build. Toolcraft carriers and bolts are build to military specifications, also known as "Mil-Spec" and they are known throughout the industry as some of the best.
Toolcraft Bolt Carrier Groups come with a lifetime warranty!
- Mil-spec carpenter No. 158® steel (bolt)
- Bolt is shot Peened and MPI
- 8620 Tool Steel (Carrier)
- Chrome Lined Carrier & Gas key
- Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring
- Tool Steel Extractor
- Shrouded Firing Pin
- Mil-Spec Gas Key (4130 Steel) attached with Grade 8 hardware and Properly staked
- Caliber: .223 / 5.56 / 300 Blackout