12 gauge, 20″ barrel with the “RER” inspection on the right side, and the bursting bomb on the top. The left side has is marked “cyl” and “PMM” with the Navy anchor” The receiver is marked “US” bursting bomb and “MILITARY FINISH” on the right side. The left stock flat has the ordnance wheel and “FJA” inspection. In mint, unissued original condition.. As good as it gets.