A butt stock version of T/C® Flex Loader™, allowing the hunter the opportunity to carry three complete charges (pellets and sabot) strapped to his muzzleloader for instant access. Made of Bio-Flex® a special silicone material that will stay pliable in the most frigid condition. Houses four 209 primers; instantly accessible. Laces on butt stock securely. Bio-Flex material grabs and almost sticks to surface of butt stock. Bio-Flex is a special medical-grade silicone material which will withstand frigid conditions and still be pliable.