This gas operated shotgun is 3 inch chambered. It has a 28 inch barrel and weighs 6.5 pounds empty. It comes with Full, Modified, and Improved Cylinder choke tubes. It holds 4 rounds in the magazine plus 1 in the chamber in 2 3/4 inch rounds. I don't know how many 3 inch rounds it holds. The shotgun is extremely clean. It functions perfectly with lighter quail loads and equally well with heavy pheasant loads. It comes with a gun sock, soft case, owners manual, choke wrench, and 2 boxes 2 3/4 inch premium 9 shot shells. An excellent back up shotgun.