This Remington manufactured pistol grip walnut stock is for the model 550 semi-auto rimfire rifle in the A grade configuration which uses barrel mounted sights and not the receiver peep sight.  This stock is in very good condition with an added oil finish and scattered light dings and handling marks overall. This consists of the stock, and the takedown screw escutcheon. (file photos)

Note: Model 550-1 rimfire rifles with the following date codes and years of manufacture have been observed with this part: