This Remington manufactured trigger 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 year/serial numbers have been observed with this part: NSN (KK) May 1941, (APP) March 1945, (DSS) September 1947, (BTT) January 1948, (PZZ) June 1953, (RB) November 1955, (PC) June 1956 &  (EF) October 1959