This Harrington & Richardson manufactured blue finished thin blade variation - front sight 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 front sight measures approx. .051 " thick. (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.