This Remington manufactured unmarked open sight step is for the model 510 Targetmaster bolt action rimfire rifle and is in very good condition with light wear.  (file photo)

Note: Remington model 510 Targetmaster rifles with the following date codes (month and year of manufacture) have been observed with this part:

1940: LJ (Feb 1940) &  PJ (June 1940)

1941: EK (October 1941) & RK (November 1941)

1942: LL (February 1942) & OL (July 1942)

1946: XRR (December 1946)

1947: LSS (Feb 1947) & PSS (June 1947)