One option would be to remove the weaver bases, get a blank picatinny rail and have it fit to your rifle. I know flat bottom picatinny blanks are available; gunsmith might have to mill bottom of the blank to fit contour of your receiver? Read complete FAQ @ link below.
Quote:
Now, what does this mean to you? Boiled down, it means that accessories designed for a Weaver system will, in most cases, fit on a “Picatinny” system. The reverse, however, is probably not the case. Due to the larger recoil groove, “Picatinny” accessories will not fit a Weaver system. There are, of course, exceptions to every rule, but for a good rule-of-thumb, “Picatinny” won’t fit Weaver, but Weaver will fit “Picatinny”.
https://www.brownells.com/aspx/learn/learndetail.aspx?lid=10724
Regards,
hm
