T/C Thompson Center White Mountain Carbine Barrel 21 Nice Condition. The item “T/C Thompson Center White Mountain Carbine Barrel 21 Nice Condition” is in sale since Saturday, February 27, 2021. This item is in the category “Sporting Goods\Hunting\Vintage Hunting\Black Powder”. The seller is “r4kidsllc” and is located in Turner, Maine. This item can be shipped to United States.