I see the SPR/M4 and the SPR/EER mounts from larue. and i know larue makes good stuff (and you pay for it) but im mounting a 50mm oblective burris on an RRA 24" upper. the burris tactical mounts just fall a little short of what i need (with the magpul prs)
so im looking for something that will give me a little bit more eye relief, and sit as close to the tube as possible. and as far as the Quick release levers... i dont really need these on this rifle and i feel a little better knowing something is made to stay put for a long long time.

any suggestions?
thanks.

nightforce unimount

or a rail extender and rings, probably gg&g along with badger or nightforce rings

+1 for the rail and rings.  id use a yhm and warne rings, im cheap.  make sure your  measurements are right on before ordering rings.