SHOTGUN: CD DEFENSE MODEL N4S 12GA-3", SERIAL NUMBER 20SA12B-3127, BLACK (MATTE), CASE NOT INCLUDED, SEMI - AUTOMATIC, 12 GAUGE, 18 Notes: The Charles Daly N4S 12 (often called the Charles Daly N4S Bullpup) is a compact, gas-operated, semi-automatic tactical shotgun chambered in 12-gauge (3-inch chamber, compatible with 2.75-inch and 3-inch shells). This shotgun is in good condition, no box or case included. Overall this shotgun is in good condition, the photos are the best statement of the condition. Please review them carefully before purchasing.