This Remington manufactured cartridge stop plunger is for the model 512 Sportmaster bolt action rimfire rifle and is in very good 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, (XK) December 1941, (CL) April 1942, (KSS) May 1947, (DSS) September 1947, (BTT) January 1948, (PZZ) June 1953,  (LA) February 1954, (RB) November 1955, (EF) October 1959, (XF) December 1959 & (PH) June 1961