The Military Armament Corp MAC 1014 Judgement Day is a 12 gauge semi-automatic shotgun featuring a gas piston operating system and military-inspired design. It is chambered for 2 3/4" and 3" shells and uses a tubular magazine with a 5+1 capacity. The shotgun has an 18.5" barrel threaded for Benelli/Mobil pattern choke tubes and comes with a choke tube kit including cylinder, modified, and full chokes. A Picatinny rail is integrated on top of the receiver for mounting optics, and the shotgun is equipped with a ghost ring rear sight and a protected front sight with a white dot to aid target acquisition. The MAC 1014 Judgement Day uses a polymer pistol grip stock with synthetic furniture and a fixed, non-adjustable stock configuration. MAC 21000154AA1 1014 Judgement Day 12 Gauge Semi-Auto 3" 5+1 18.50" Anodized Steel Barrel, Black/Gray Anodized Receiver w/Red "SKYNET" & Picatinny Rail, Synthetic Stock, Black Polymer Grip.