Manufactured by Billistics Incorporated of Wallingford, Connecticut, this is a close copy of the Heckler & Koch G21 general purpose machine gun. Using the action and receiver of the G3 infantry rifle as a base, the G21 incorporates features like quick-detach barrels and a belt feed mechanism to augment the suppressive fire capacity of the weapon. Post front and 2-12 graduated peep sight, with a bipod on the ventilated barrel shroud, "HK G3/21 A039361" on top of the receiver, green pistol grip and green plastic buttstock. The receiver is in "pin" configuration, with reinforcement panels over the stock guides, extended mounting point for the belt feed mechanism, and a right handed "S/E/F" selector arrangement. The bolt assembly is configured to be compatible with the feed mechanism, dated "4/70" on the carrier and "2/70" on the head, with mixed numbers. The trigger pack is "pin" pattern, with proper G21 style ejector. Included with the lot is an adapter for G3 pattern magazines.