[3] The pistol uses a pre-tensioned striker firing system, and is chambered in 9mm Luger and .45 ACP.

[4] The serialized part of the pistol is a steel chassis, which is fit to a glass-filled nylon frame.

The frame incorporates a Picatinny rail for mounting accessories.

[5] In September 2016, Ruger announced compact versions of the pistol, again chambered in 9mm Luger and .45 ACP.

[6][1] In March 2020, Ruger introduced the American Pistol Competition, chambered in 9mm, and the American Pistol Compact with gray Cerakote finish, chambered in .45 ACP.