This Harrington & Richardson manufactured blue finished thick blade variation - front sight is for the model 865 Plainsman 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. .081 " thick. (file photo)

Note: Harrington & Richardson model 865 bolt action single shot rimfire rifles with the following serial numbers have been observed with this part: AG245585 & AX570318

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