5.56 HPT/MPI M-16 Bolt Carrier Group with PSA rear flip up sight

Made in USA.  Bolt is made of Mil-spec Carpenter 158 steel, Shot peened, High pressure tested and Mag Particle Inspected.   Gas key is machined out of bar stock, chrome lined phosphate coated, and secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is phosphated outside and chrome lined inside.  There is no laser engraved logo. Features: Milspec Carpenter No. 158® steel bolt Shot Peened Bolt High pressure tested Mag particle inspected Chrome Lined Carrier (AUTO) Chrome Lined Gas Key Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor O-ring Insert SKU 46284