For sale is an AR Five Seven AR57/Anvil Arms semi-automatic rifle in 5.7x28mm. Serial number- AA004932. This rifle is in good condition and comes with a bipod and (5) 50-round FN P90 magazines. It features an Anvil Arms AA-15 lower receiver but its true feature is the hard-to-find AR Five Seven AR57 upper that converts the rifle to shoot 5.7x28mm and accept P90 magazines. Manufactured by the eponymous AR57 LLC, and chambered in 5.7x28mm, this upper is less powerful than the standard 5.56mm version, but it has certain tangible advantages, including reduced muzzle blast, a high practical rate of fire, nonexistent recoil, and the ability to use folding stocks. Since the buffer is located within the receiver, folding stocks may also be used for compact storage or carry. Empties eject downward through the nominal magazine well. Some people use a 20-round magazine body with the feed lips, spring, and follower removed to act as a brass catcher.
V2-A6
Barrel Length: 16
Bore condition: Good