range? exactly- what range? 100-800yards?
I was shopping recently for my m1a which is prolly a similiar deal. heres what I came upon....
minox makes a good, lightweight 1.5-8x which is good for in close and the 8x takes you out there a bit.
When Im at the range I usually have the scope dialed to max all the time- and weight prolly isnt a factor if its just a range gun. If you wanna see the holes at 100 yards look at vortex/bushnell 6-24x. Choose whether or not to listen to optics snobs based on how much money you wanna spend. I simply cant/wont bring myself to spend a G on a scope but have been pretty happy with what I can get from vortex or minox for $500