U.S. WWI M1903 Springfield Rifle Kerr Standard Extension Gun Sling Outstanding reproduction of M1903 Kerr Standard Extension Gun Sling sling. Designed to fit most U.S. rifles used in WW1 and WW2. Constructed of high quality web with steel fittings. Sling length adjusts between 30 and 43 depending upon configuration. Look at photos for original illustrated attachment instructions!