This Remington manufactured late variation pre grade front sight measures between .390" and .400" tall and is for the pre grade model 552 Speedmaster semi-auto rimfire rifle manufactured during the late 1960's and early 1970's with the early pre grade rifle length barrel. This front sight is in very good condition with light wear. (file photo)

Note: Firearms with the following serial numbers have been observed with this part: N.S.N. (October 1965) & 1464240, 1713644