This Remington manufactured cartridge stop plunger spring is for the model 512 Sportmaster bolt action rimfire rifle and is in near excellent condition with light wear. (file photo)

NOTE: Remington model 512 rimfire rifles with the following date codes and/or serial numbers have been observed with this part: N.S.N. (KK) May 1941, (CL) April 1942, (KSS) May 1947, (OSS) July 1947, (BTT) January 1948, (LA) February 1954, (XF) December 1959 & (PH) June 1961