 Saddle ring

A saddle ring is a metal ring attached to the receiver of a rifle or carbine allowing it to be tied to a saddle or used with a special sling.Saddle rings could be attached directly to the firearm, or in some cases to a saddle ring bar, which allowed the saddle ring to slide along the action, such as on the British Enfield P1856, a short cavalry version of the Pattern 1853 Enfield used in the American Civil War.