This 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

SKU#: TOOAUTO-011

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