This Marlin manufactured pistol grip Monte Carlo walnut stock with butt plate, butt plate screws, white line spacer and Bullseye trademark logo along the toe line of the butt section is for the model 99 M1 semi-auto rimfire rifle and is in good to about very good condition containing light dings and handling marks.  (file photos)

Note: Marlin model 99M1 semi-auto rimfire rifles with the following years/serial numbers have been observed with this part:

N.S.N. (IL): September 1968

1974: 26445526