This Remington manufactured open sight step marked "R" is for the model 514 bolt action rimfire rifle and is in very good condition with light wear.  (file photo)

Note: Remington model 514 bolt action rimfire rifles with the following date codes (month and year of manufacture) have been observed with this part:

Boy's Rifle: BJ (Jan. 1962), DK (Sept. 1963)

Standard Rifle: OH (July 1961), AM (March 1965), BP (January 1967), XR (Dec. 1968), DS (Sept. 1969), BT January 1970 w/ Ser. # 2022781), AT (March 1970 w/ Ser.# 2023401) & RO (November 1977 Ser. # A1431560)