The invention is a versatile, but simple, rifle sling for carrying a rifle, shotgun, or other long gun over one shoulder. The sling can be attached to the rifle by use of studs or swivels in a conventional manner or can be attached directly to the firearm by using the adjustable loops at each end of the sling. It is constructed from a single strip of leather without the use of any hardware such as buckles, clasps, clamps, hooks, rivets, screws or other devices. Each of the adjustable loops are formed from slide-lock knots.