AR-15 Bolt Carrier Groups On Sale

The bolt carrier group (BCG) is what holds the bolt, firing pin and is basically the heart of the rifle. Some of the BCGs are marked auto, full auto or semi. *Buying a full auto BCG will not make the AR-15 full auto. *The only difference between a auto/full auto and a semi BCG, is[.....]

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AR-15 Bolt Carrier Groups On Sale