This Knight 209 Primer Ignition 50 Cal Muzzleloader Conversion Kit converts black powder guns shooting No. 11 or musket caps to shoot 209 ignitions system. This Kit Fits .50 caliber Bighorn, Littlehorn, Wolverine, TK2000, LK2, LK93, American Knight, and USAK, as well as any .54 cal rifle built after 1994.