IWI US, Inc Tavor TS12, Semi-automatic Shotgun, Bullpup, 12 Gauge 3 Chamber, 18.5 Barrel, Matte Finish, OliveDrab Green, Fixed Stock, Accepts Beretta Multi Chokes, 5+5+5 Rounds TS12G The Tavor TS12 12 gauge shotgun is a gas regulated bullpup shotgun that can be configured for either right or left side ejection and operation. It feeds from one of three magazine tubes which can hold four 3 inch shotgun shells or five 2 3/4 inch shotgun shells. This means that the potential magazine capacity is 15 rounds plus one additional round in the chamber.