Thompson Centers Pro Hunter 209x50 muzzleloader barrels are some of the most technologically advanced barrels on the market today. Speed Breech XT in the Endeavor barrels offers the only quarter turn and out breech plug. Fast cleaning and easy field takedown make this barrel a muzzleloader hunters dream. For 2011 Thompson Center is proud to introduce the new Weather Shield Pro Hunter barrel that offers a hand removable triple lead thread breech plug.