Weaver mounts are likely to be okay, as long as they are not $5 mounts. I don't know about them, though. A rail is nice because it allows you to place scope anywhere forward or back as necessary for your eye relief needs. (Sometimes it is hard to make 2 piece mounts fit shorter scopes on a long action. Yours is a short action, though, so you may be alright regardless. ) If you didn't already have 2 piece mounts, I'd suggest a rail. As it is, don't worry about it if the bases are of decent quality.