Thompson Center Contender G2 357 Magnum Barrel 12. The item “Thompson Center Contender G2 357 Magnum Barrel 12 EXCELLENT” is in sale since Thursday, April 8, 2021. This item is in the category “Sporting Goods\Hunting\Gun Parts\Pistol”. The seller is “r4kidsllc” and is located in Turner, Maine. This item can be shipped to United States.