hey guys, just got a redfield revolution 4-12x, and i want to try it out on my ar-15. i got some leupold QD rings. i first got the medium height, but that was too low, so go the high. that one fits, but with maybe about 1/4" of clearance from the bottom of the scope to the top of the rail. this is a free-float tube. this won't cause any problems with it kicking up and hitting the scope, correct? i've never shot through a scope before, and would hate to ruin it before i even begin. thanks!