SHOTGUN: MILITARY ARMAMENT CORP MODEL MAC 2 IMPORTED BY MILITARY ARMAMENT CORP, SERIAL NUMBER 751-H25YT-4828, BLUE / CCH, CASE NOT INCLUDED, SEMI - AUTOMATIC, 12 GAUGE, 19 Notes: MILITARY ARMAMENT CORP MAC 2 12G 5 ROUND TUBE CAPACITY SEMI AUTO WOOD STOCK RAIL MOUNT 18.5 IN BARRELL 41IN TOTAL LENGTH WE BELIVE THE EXTENSION TUBE TO BE A PLUS 4 BASED ON THE PHYSICAL MEASUREMENTS OF IT WE DID NOT LOAD SHELLS.