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The Toolcraft left-handed M16 bolt carrier group is designed for 5.56 NATO AR-15 pattern rifles and configured with a full-auto rated M16 profile. The carrier is machined from 8620 aircraft-quality steel, known for its strength and case-hardening capabilities, and finished with a salt bath nitride treatment that enhances surface hardness and corrosion resistance. The bolt is made from Carpenter 158 tool steel and shot peened for improved durability under high-pressure operation. This configuration is built to true Mil-Spec dimensions and suited for left-handed ejection systems.
Each component in this assembly is produced to precise specifications for long-term integrity. The gas key is manufactured from 4130 steel and secured with grade 8 staked screws. The extractor and cam pin are constructed from 4140 steel, while the firing pin is made from hard chrome ground 8740 steel. The bolt is magnetic particle inspected to verify structural soundness. The nitride finish provides a smooth, dark surface that resists fouling and wear from repeated cycling. This bolt carrier group is in new condition.
Included is the complete left-handed bolt carrier group with bolt, carrier, gas key, cam pin, extractor, and firing pin installed. The assembly is produced by Toolcraft Inc., a manufacturer known for precision machining and rigorous quality control in AR-platform components. No additional accessories or packaging details are specified beyond the complete carrier group itself.
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