John Dean "Jeff" Cooper was a United States Marine, the creator of the "modern technique" of handgun shooting, and an expert on the use and history of small arms.

Gunsite is a privately run firearms training facility based in Yavapai County, Arizona, just south-west of Paulden in the United States. It offers tuition-based instruction in handgun, carbine, rifle and shotgun shooting. Located on a 3,000-acre (12 km2) facility, Gunsite has classrooms, indoor and outdoor firing simulators, and various pistol and long-barrel ranges. The ranges go out to 2000 yards for precision rifle training. There is also an on-site pro shop and gunsmith.