Scope = Falcon Optics Merlin 4-14x56 Rifle = Savage 10FCP HSP Base = EGW 1-piece 20MOA (so scope will be angling towards the barrel) Rings = Most likely Burris XTRs -Low = .25" -Med. = .50" -High = .75" -X. High = 1.00" (all are measured from top of base, to bottom of tube) Base height = ~0.400" from top of receiver radius, to the tip top of the base. Scope objective diameter = ~2.520" Scope objective w/ stock cover = ~2.655" (will be using this measurement as I'll probably be using Butler Creek covers) Tube diameter = 30mm = ~1.185" Figure in ~0.125" extra height for wiggle room. The top of the barrel is also a bit lower than the top radius of the receiver, so that will be a bit of a buffer as well. So, with those measurements outta the ways, here's my math: (Objective dia. - tube dia.)/2 + 0.125" (buffer) = total height needed (2.655" - 1.185" = 1.470")/ 2 = 0.735" + 0.125" = 0.860" total heigh needed to clear receiver w/ 0.125" of wiggle room. So, 0.860" - 0.400" (base height) = 0.460" total right height needed. = Medium rings needed. 0.50" ring height seems a bit low for a 56mm scope, even with all the buffers I'm throwing in there. Is my math right? Sorry for the long-winded post, but I want to be sure.