1. LSUbeatUby40

    Anyone knowthe OD of an H&R Ultra Varmint?

    Rifle? I hav a 762-SD I want to be able to mount on it and I don't know the OD of the barrel to know if I have to buy a new 1/2x28 18-tooth blackout mount or if I can use the 9/16x24L one I already have..