The Dixie Early American Jaegers are manufactured to use interchangeable locks. We suggest purchasing the gun in percussion - changing to flint - so drum and cut-out in lockplate will be properly fitted and aligned. Locks are color casehardened and tumblers are fitted with fly for smoother action. Now you can easily convert that Jaeger from one ignition to the other for competition, weather conditions or just for fun. Must order the vent NP0835 or drum and nipple NP6312 seperately.