Sons of Liberty AR-15 M16 Profile 5.56/300 BLK Bolt Carrier Group - Nickel Teflon Coating (NTC)

Sons of Liberty AR-15 M16 Profile 5.56/300 BLK Bolt Carrier Group - Nickel Teflon Coating (NTC)Sons of Liberty shows that in order to make the best products in the industry, you don't have to add bells and whistles. It takes consistently delivering a product that performs to a professional standard. That is what SOLGW does with its mil-spec line of components.Bolt Precision machined from Carpenter Technology No. 158 chrome-nickel alloy Heat-treated per MIL-SPEC, Shot peened per ASTM B851/SAE AMS2430S, Vibratory tumbled Individual high-pressure/proof (HP) test Full Auto test fired at the assembly Individual magnetic particle inspection ASTM E1444/E1444M (MP) Nickel Teflon Coated Markings deep laser engraved (SP=Shot Peened, HP=High Pressure Tested, MP=Magnetic Particle Inspection).Extractor Precision machined from 4340 tool steel alloy per SAE AMS6415T/AMS6484D (vs 4140) Heat treated Shot peen per ASTM B851/SAE AMS2430SExtractor Retaining Pin: Precision machined and ground S7 Tool Steel Heat-treated per ASTM A681-08 Shot peened per MIL-SPEC print Manganese phosphateExtractor Spring Tactical Springs/Sprinco 5 coil, ASTM Grade A401 Chrome Silicon wire stock Heat treated Stress relieved, Molybdenum-Disulfide infused Cryogenic processed (Hidden post winding) Mil-spec black insert/synthetic elastomer extractor buffer (nitrile-butadiene, shore hardness 80+/-5 durometer per MIL-PRF-6855)Ejector S7 Tool Steel Heat-treated per ASTM A681-08 Shot peened per Mil-Spec Nickel Teflon Coated Ejector Spring: Heat treated Mil SpecGas Rings Standard stainless steel per Mil-Spec X3Carrier Machined from AISI 8620 aircraft-quality alloy per ASTM A108/A322-13 Full auto profile Heat-treated Carburized/strain relieved, hard chrome bore Precision-ground gas key interface Sons of Liberty Battle Flag logo deep laser-engraved Nickel Teflon CoatedGas Key Machined from 4130 Chromoly steel alloy per ASTM A108/A322-13 Heat-treated, hard chrome internal Nickel Teflon Coated Permatex sealed Grade 8 hex screws torqued and staked, Hidden per mil-specCam Pin Precision machined 4340 Chromoly steel alloy per SAE AMS6415T/AMS6484D Heat-treated/processed per MIL-SPEC Nickel Teflon Coated Solid film lubricant applied and cured per MIL-SPECFiring Pin Precision-machined 8640 steel alloy Heat-treated/processed per MIL-SPEC Hard chrome plateFiring Pin Retaining Pin Precision machined from 1038 carbon steel Heat-treated/processed per MIL-SPEC Manganese phosphate