finding the model of a Knight is really simple, just look at the right side of the barrel about 2 or 3 inches up from the serial number and the model info is stamped on the barrel. If your barrel is camo it may be difficult to see...

it will also give you the caliber and a bunch of other numbers, which i think are patent #'s and will say "black powder only"

if you call knight, they will ask you to look at your barrel anyway