Turn the receiver upside down and locate the firing pin retainer set screw. Using the flat screwdriver end of the extractor, turn the firing pin retainer set screw approximately two turns clockwise. Turn the receiver upward and with your free hand catch the firing pin, as it will free fall from the receiver. Set it aside.
Do not disassemble your rifle any further. Any additional disassembly should only be performed by a qualified gunsmith or by Knight Rifles warranty staff.
Knight Rifles, American Made muzzleloaders.