Gauge:  12 Ga / 16 Ga / 20 Ga / 28 Ga / .410 Ga Chamber: 3" / 76mm Barrel Length: 32, 47, 51, 55, 61, 65, 71, 76, 81 cm Receiver: Steel Barrel: 4140 Full Steel Choke: Mobil Choke, Slug Stock:Synthetic System:Extractor