- Robert E. Petersen Collection
- Ancient Firearms - 1350 to 1700
- Road to American Liberty - 1700 to 1780
- A Prospering New Republic - 1780 to 1860
- The American West - 1850 to 1900
- Innovation, Oddities and Competition
- Theodore Roosevelt and Elegant Arms - 1880s to 1920s
- World War I and Firearms Innovation
- WWII, Korea, Vietnam and Beyond - 1940 to Present
- For the Fun of It
- Modern Firearms - 1950 to Present
- Hollywood Guns
- A Nation Asunder - 1861 to 1865
Smith & Wesson Model 66 revolver
This stainless steel revolver illustrates what happens when an overcharge of gunpowder detonates in a cylinder chamber. The cartridge with an excessive powder charge was a reload. The topstrap on this revolver broke off the frame at the front and the rear sight was thrown off and was not recovered. The bulged and ruptured cylinder can be opened and closed back into the frame.
This damaged revolver was used for many years as an instructional aid by an NRA firearms instructor.