Vintage U.S. military Kerr "NoBuckl" rifle sling featuring khaki-colored woven cotton webbing and distinctive patented metal adjustment hardware. The sling incorporates steel fittings stamped "NoBuckl," "REG. U.S. PAT. OFF.," and "PAT'D 7-21-14," referencing the July 21, 1914 patent. The Kerr sling design was used with U.S. military rifles, including the M1903 Springfield and M1917 Enfield, during the World War I era. Also can be found on Trench Shotguns and Thompson Guns. Features an adjustable web strap with metal attachment fittings and sliding adjustment hardware.