Mount up! Saddle ring Marlin cowboy guns
Harkening back to the good old “hell for leather” days of the U.S. cavalry, the saddle ring attachment on Marlin lever action rifles have been around for over a century and is still available (of sorts) today.
Why the saddle ring?

Close up of Marlin 1893 SRC .30-30 Win caliber saddle ring carbine via Collectors Arms
European horse soldiers of the Napoleonic Wars often added a small carbine to their more traditional armament of saddle pistol, saber, heavy sword, and lance. At some point, a clever fellow figured out that the easiest way to carry these short rifles was to sling a strap across their chest from shoulder to waist and around their back with a snap on it that attached to the carbine via a ring. In short, this was the first single-point sling (and we think we are so high-speed today because we use the same concept!)
Well, the U.S. Army developed its 19th Century guidance by keeping up with the Europeans and by the 1820s, American cavalry also carried short-barreled single shot carbines attached by a sling and saddle ring arrangement. This continued for over 70 years, with the last U.S. military issued saddle ring carbine being the M1896 Krag-Jorgensens that remained in service with National Guard cavalry units until World War One.

As you can see in this picture, with the U.S. Cavalry trooper to the left with his 1873 Springfield carbine and the Union horse soldier to the right with his Hall Model 1836 breech loading percussion carbine, both are hooked up to standard cavalry slings across the user’s chest– through the saddle ring. (Library of Congress images)
In the 1860s, popular lever-action rifle makers such as Sharps, Spencer, Henry and Winchester produced models of their shorter barreled carbines complete with saddle rings just in case the Army or a local militia unit (before 1903 each state and county was responsible for arming their own) was looking for guns.
When John Marlin’s first lever-action repeating rifle, the Model 1881 took shape, it didn’t have one, but when the 1889 came out, just to keep the bases covered, JM made sure short-barreled models had a ring.
