STOCK UP and SAVE! Go to my store or “sellers other items” and type in “muzzleloader” to see more! NEW Thompson Center Hawken Flintlock Barrel. In the white, hooked breech, 54 cal, 1″ x 29″ overall length. From a new kit that was never assembled. Very rare find and sought after barrel even used but this one is fresh out of the box. Bore is flawless as expected. We pride ourselves in offering a variety of quality production, custom and aftermarket replacement parts and supplies for black powder builders, shooters and enthusiasts of any level.