Caution on the use of the picatinny type base and rings.Some of these railswill raise your scope higher than regular rings / bases. If you don't shoot with a firm cheekweld to the stock, this should not bother you. But if you like to keep your head firmly on the stock you may have to get a strap-on cheekpiece.

Did you try the extended bases from Burris and leupold for that rifle? They will be a 2 peice unit.
The stocks on the military guns take the mount height into consideration, that accustock does'nt.

Take a look at Brownells.com for mounts and bases.