Since this is in the handgun forum, I'll limit my list only to handguns:
Revolvers
Unmodified Webley Mk. V
Webley "WG" Army Model
Webley-Fosbury Automatic Revolver
S&W Pre-War Registered Magnum with 3 1/2" barrel
S&W Triple Lock
S&W Pre-M29 with 4" barrel
Original S&W Model 3 Russian
Original S&W Model 3 Schofield
Remington Model 1875 in .44-40
Original Colt Walker
Colt New Service Shooting Master .357 Magnum
Manurhin MR73 with 3" barrel
Semi-Automatics
Swiss Luger
C-96 "Broomhandle" Mauser
Sig P210
HK Mark 23 SOCOM
Steyr-Hahn M1912
Bren Ten
GP-35 Hi-Power with tangent rear sight and detatchable stock
Pre-war Colt Gov't Model .38 Super
Wildey in .45 Winchester Magnum
If you want rifles, shotguns, and NFA weapons, I can give you ideas there too.