Carlson's Choke Tubes +7 Extended Magazine Tube Kit for 12GA Tristar Viper Shotguns

The Carlson's Choke Tubes +7 Extended Magazine Tube Kit for 12GA Tristar Viper Shotguns is a must-have shotgun magazine upgrade engineered to have up to 7 rounds of ammo (2.75" shells) without any permanent modification or gunsmithing to your shotgun. Built to handle heavy recoil and ensure long-lasting service in any target-rich environment, this kit features all-steel steel construction with a corrosion-resistant blued finish and a high-strength steel base clamp for increased strength and stability. The clamp's built-in sling swivel stud serves as the forward mount for any 2-point sling. Further, this kit includes a high-visibility polymer follower and steel spring to ensure smooth and dependable operation. Plus, the threaded tube extension installs directly to your shotgun's factory-length magazine tube for quick installation and reliable performance right out of the box.**Magazine round count is for the total capacity using 2 3/4-inch shells including 1 in the chamber**Note: When using 3" shells, you lose 1 shell capacity. When using 3.5" shells, you lose 2 shell capacity.