AR-15 .223/5.56 Bolt Carrier Group- Black Nitride (Made in USA)Carrier M16 style (Auto) Machined from 8620 tool steel Heat treated to military specificationsBolt Machined from 9310 tool steel Heat treated to mi..
MANUFACTURED TO FIT THE MIL SPEC STANDARD LOWER PARTS KIT Ramped carrier group uses standard mil-spec hammerSpring loaded enhanced firing pinMachined from 8620 tool steelFinish: NitriteCompatible with both GLOCK and COLT 9mm AR-9 magazinesDrop in readyProperly staked keyRemovable ramped counter..
MADE IN THE U.S.A Heat treated, shot peened, relief cut, and machined to exact mil spec dimensions.Nickel boron coated to provide increased lubricity and much
greater wear resistance than other finishes. The coating makes easier cleaning Bolt Features Carpenter 158 Steel Hea..