Lyman Percussion Great Plains Pistol uses a capper percussion system rather than flintlock, offering improved reliability for hunters. Color case-hardened lock, select walnut stock, and 6-inch barrel. Type: Muzzleloader Action: Flintlock Caliber: .50 Cal Black Powder Capacity: 1 Year introduced: 1992, USA Weight: 36 oz Overall length: 11.5" Status: Active Intended use: Collector, Target Shooting