This fits the Thompson Center T/C White Mountain Carbine and Pennsylvania Hunter Stocks Much faster twist rate then the Standard T/C barrels. Barrel is 21 long. Bore is bright and shiny. The item “Thompson Center T/C Black Fox Ridge White Mountain Carbine barrel 50 Cal” is in sale since Friday, March 9, 2018. 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.