A bolt carrier group (BCG) without hammer is a critical assembly for AR-15, AR-10, or similar rifles, responsible for cycling, chambering, extraction, and firing, but does not include the hammer from the fire control group. It consists of the bolt, carrier, gas key, firing pin, cam pin, and retaining pin. The BCG without hammer works with the upper receiver, barrel, charging handle, and lower receiver (where the hammer’s installed separately), ensuring reliable operation in AR platform builds.
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