The Galleries
- Robert E. Petersen Collection
- Ancient Firearms - 1350 to 1700
- Road to American Liberty - 1700 to 1780
- A Prospering New Republic - 1780 to 1860
- A Nation Asunder - 1861 to 1865
- 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
John Sherry Jr. Percussion Rifle
John Sherry was a gunsmith in Clarion County, Pennsylvania. He apprenticed at the Leman Rifle Shop, where his father was also employed, between 1814 and 1826, and he established his own shop in 1830. Sherry is credited with the invention of the segmental rifle groove, and he was one of the first to use gain twist rifling.