The Galleries
- Robert E. Petersen Collection
- Ancient Firearms
- The Road to American Liberty
- Seeds of Greatness
- The Prospering New Republic
- A Nation Asunder
- The American West
- Innovation, Oddities and Competition
- Theodore Roosevelt, Elegant Arms
- World War I and Firearms Innovation
- WWII, Korea, Vietnam and Beyond
- For the Fun of It
- Firearms Traditions for Today
- William B. Ruger Special Exhibits
- Freedom's Doorway
COP Derringer
Compact Offduty Police = COP. This stainless steel 4-shot handgun that was intended as a backup arm for law enforcement officers. The heavy weight (28 oz.) of this pistol and limited firepower compared to other compact semi-automatic sidearms resulted in its discontinuation.