Weaver

Each Weaver base is machined to the tightest tolerances for a custom fit. They are designed to fight the effects of recoil with a square-cut notch that precisely mates to the sturdy cross bolt in every Weaver detachable ring. - Fits: - H & R Models 155 SB2 Ultra Topper 158C for Post 1973 & all calibers of the Whitetail Classic Lever action Pardner - New England Firearms Models Handy Rifle &/ Hornet Huntsman Muzzleloader