Description

-Mil-Spec 8620 tool steel M16 bolt carrier w/shrouded firing pin.-Carrier has 5.3.1.2 MIL-STD-171 phosphate finish inside and out with 1.2.2.2 MIL-STD-171 hard chrome bore.-Laser engraved with ST Spider logo (visable through ejection port door opening).-Mil-Spec tool steel carrier key.-Carrier key has 5.3.1.2 MIL-STD-171 phosphate finish inside and out with 1.2.2.2 MIL-STD-171 hard chrome bore.-Carrier key is attached with Grade 8 hardware and properly staked per the Mil-Spec.-Bolts are CNC machined from Carpenter No. 158®.-Bolts have 5.3.1.2 MIL-STD-171 phosphate finish inside and out.-All bolts are shot peened per the current Mil-Spec.-All bolts are Individually High Pressure Tested (HPT) and then Individually Magnetic Particle Inspected (MPI).-Tool steel extractor, shot peened, 5.3.1.2 MIL-STD-171 phosphate finish, fitted with a Mil-Spec black extractor spring insert and Mil-Spec Viton o-ring.-Mil-Spec firing pin with 1.2.2.2 MIL-STD-171 hard chrome finish.-Mil-Spec cam pin with 5.3.1.2 MIL-STD-171 phosphate finish.-Mil-Spec firing pin retaining pin with 5.3.1.2 MIL-STD-171 phosphate finish.