Thompson Center T/C HAWKEN Percussion Barrel 45 Caliber 15/16 across the flats Nice bore. I rate it an 8 out of 10. Barrel is 28 long. The item “Thompson Center T/C HAWKEN Barrel 45 Caliber Percussion” is in sale since Monday, March 5, 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.