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
Robert E. Petersen's Personal Firearms
Churchill Utility Model XXV Shotgun - 12 ga.
Colt Government Model Pistol - .45 ACP cal.
Dan Wesson D11 Revolver - .357 Magnum cal.
Freedom Arms 454 Casull Revolver - .454 Casull cal.
Perazzi Over-Under Shotgun - 12 ga.
Robert Stack's Parker 20 gauge
Robert Stack's Purdey 
Winchester Model 21 Pachmayr Shotgun - 20 ga.
Winchester Model 21 Shotgun - 20 ga.