Description
Microbest 5.56 NATO AR 15 Bolt Carrier Group – Black NitrideThe Microbest 5.56 NATO AR 15 Bolt Carrier is known for being the benchmark for quality and reliability throughout the industry. Microbest not only manufactures their own bolt carriers, but also provides parts to some of the biggest and most well known brands. These AR 15 bolt carriers feature a corrosion resistant salt bath nitride finish and come with a lifetime warranty.Features.233/5.56 NATOCorrosion resistantsalt bath nitride finishM16 cutAircraft quality 8620 steel carrier4130 steel gas keyProperly staked grade 8 gas key screwsCarpenter 158 steel bolt4140 steel extractorMIL-SPEC O-ringMIL-SPEC gas rings4140 steel cam pin8740 steel firing pin with hard chrome finishMagnetic particle inspectedLifetime warrantyProudly made in the U.S.A.
