i recently picked up a Rem. R25 in .308...i have a scope mounted on it on some Medium rings (it is almost too low, but i can still see well enough to make a shot) anyway im going to get some "high" rings which will be much more comfortable to see through....im also looking to buy some BUIS.. so my question is, how many of you have a rear BUIS mounted under your scopes...and what size rings are you using...??? high or extra high..? the sights im looking to buy folds down to .435" (rear)