Weaver 82 Top Mount Base48082 Gloss
One piece base used on the following:
H&R 155, SB2 Ultra (.22 - 250)925 Topper 158C for 1973 and after, 157 drilled and tapped; 058; Whitetail Unlimited (all calibers)
New England Firearms
Handy Rifle, Hornet :(use Extra High Rings)