Description New Haven/Mossberg 600-AT Riot Gun chambered in 12 gauge 2 3/4″ with a five round capacity and a 18.5″ barrel. Interchangeable with Mossberg Model 500 parts. The bore has a fixed Cylinder choke. Rubber butt pad. Davis M-500 composite stock and serrated front forend. Blued trigger, receiver, magazine tube and barrel. Rear receiver tang slide button safety. Front fixed metal bead sight. Comes with nylon shoulder sling. Must ship to a FFL holder. Condition: Good with scratches, dings, spots of rust and handling wear. Clean rifled bore. Barrel Length: 18.5″ Serial: H807831 Manufacturer: Mossberg Gauge: 12 Model: 600 AT Riot Gun Book# 08425