This Harrington & Richardson manufactured sear pin is for the model 750 Pioneer bolt action rimfire rifle and is in very good condition with light wear and possibly a few specks of rust. This pin measures approx. .560 "-.565 " long. (file photo)

Note: Harrington & Richardson model 750 Pioneer bolt action single shot rimfire rifles with the following serial numbers have been observed with this part: N.S.N.