Flounder - It just may be a rifle primer striker.
It is listed in the 1995 Knight catalog as the "Magnum Primer Conversion Kit" #900610 Blued and #900612 Stainless Steel
"Magnum Elite technology is now available for the percussion rifle owner. This system utilizes an extremely hot magnum rifle primer producing a hotter flame with faster, more reliable ignition. Included in the Kit are 10 primer adapters, a capping tool and a specially-designed hammer with a raised hammer face that will give the shooter spontaneous ignition - every time. Available for blued and stainless steel models. Fits all percussion Knight Rifles."
It looks like the brass holder that accepts the rifle primer, fits over the #11 nipple. This would make sense on why the striker is a little shorter.
"Primer Adapters" #900611
"Primer Adapters work with the magnum primer conversion kit. With the purchase of magnum rifle primers, they can be inserted into the adapters. This specialized system gives the shooter faster, quicker, more reliable ignition. 10 per pack."
It is listed in the 1995 Knight catalog as the "Magnum Primer Conversion Kit" #900610 Blued and #900612 Stainless Steel
"Magnum Elite technology is now available for the percussion rifle owner. This system utilizes an extremely hot magnum rifle primer producing a hotter flame with faster, more reliable ignition. Included in the Kit are 10 primer adapters, a capping tool and a specially-designed hammer with a raised hammer face that will give the shooter spontaneous ignition - every time. Available for blued and stainless steel models. Fits all percussion Knight Rifles."
It looks like the brass holder that accepts the rifle primer, fits over the #11 nipple. This would make sense on why the striker is a little shorter.
"Primer Adapters" #900611
"Primer Adapters work with the magnum primer conversion kit. With the purchase of magnum rifle primers, they can be inserted into the adapters. This specialized system gives the shooter faster, quicker, more reliable ignition. 10 per pack."