The Carbine Snap Swivel goes on the carbine sling which is used by Cavalry troopers to keep their carbines handy while mounted. A must for any good Cavalry soldier. Is used with the 1859 Sharps Carbine, 1863 Sharps Carbine, the Maynard Carbine and other Civil War carbines as well as carbines issued to the Cavalry during the Indian Wars.