I noticed when the Buck Mark was added they added a few more guns to the quiz. Here is a quick list of ones I've noticed that aren't one the Gd.jpg.
Ruger MkII, Ruger 22, Ruger No.1, CX4 Storm, Marlin 336
Do you want to rework your image?
I also wanted to throw this out there... I've been thinking about making an interactive helper page where you could click on Pistol or Revolver and it would just show you pics of those guns that fall into that category. Might help less familiar people find unknowns a little quicker. - XavierBK (talk) 13:34, April 2, 2014 (UTC)