SIG Sauer of Newington, New Hampshire, manufactures a full line of 1911 styled handguns.

The earliest models were very faithful to the John M. Browning designed Colt M1911 Pistol which became the United States standard sidearm and served in that capacity for some seven decades before being replaced by the Beretta M9 handgun.

Due to the poor performance of the .38 Long Colt revolvers used in the Philippines during and after the Spanish–American War the US Army sought a new handgun to be chambered in a larger caliber.

The GSR is reported to have produced range results of a 1.5" group at 25 meters.

[7] The TAC OPS and Scorpion versions feature a Picatinny rail, night sights, and a threaded barrel to allow the user to attach a sound suppressor.