I have a RWS model 48 and it came with a RWS 4x scope on it and i also have a couple nikon prostaff scopes kicking around a 3-9 and a 2-7 and I was wondering if anyone knew if they would hold up to the reverse recoil of a air rifle? I'd like to have a bit more magnification on the model 48. If the prostaff won't can anyone recommend any good varible power scopes that won't break the bank? Thanks for any info