He has been a member of the board of directors of the National Rifle Association and served as a spokesman for the organization. He resigned from the board on September 18, 2018. After his close friend Charlton Heston stepped down from his role as an NRA spokesman in 2003, Selleck succeeded him. In 2002, Selleck donated the rifle he used in "Quigley Down Under" (a custom 13-pound single-shot, 1874 Sharps Rifle, with a 34-inch [86-cm barrel), along with six other firearms from his other films, to the NRA. The firearms are part of the NRA's exhibit "Real Guns of Reel Heroes" at the National Firearms Museum in Fairfax, Virginia.