I think the Burris XTR 2 piece base with a good ring (I prefer Seekins) is the way to go. There are 1 piece rails for the M7 that will do the same but are noticeably higher. The rings aren't truly quick detach but with the star bit (wrench) it's easy enough.

The 700 base has 3 holes in the rear base with spacing for either a 700 or M7.