This Harrington & Richardson manufactured fourth variation bolt assembly with a short top slot and cocking indicator is for the model 865 Plainsman bolt action rimfire rifle and is in very good condition with light wear. This bolt assembly measures approx. 4 7/8" long.  The top slot allows this bolt assembly to fit in a reciever that has a cartridge guide. The top slot on this part measures approx. .310" long. (file photo)

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