Check out American Defense MFG, The Shooting edge sells them.
They have AR15 "height" strait-up and cantilever mounts.
I have the "Strait-up LOW" mount on my Tikka T3 Tac bolt gun, and it does indeed keep it's zero, even when removed and re-installed multiple times.
I would say for the RFB as it has the longer rail at the front, the strait-up mounts would work best, as it gives you more flexibility for mounting. But the cantilever mounts will work too. The Recon have 2 locking levers for an ultra solid lock, the "Scout" models have 1 lock lever for quicker optic changes, still a solid hold though.
GG&G (wolverine carries them) also has an AR15 height "strait up" one piece QR mount that I have heard is pretty good, they garauntee a 1/2 MOA or lower return to zero.
ETA
Strangely enough TSE doesn't have the "strait-up 30mm" version listed, BUT they do have the SW (strait-up Wide) which has a little more space between the rings. Still has enough room to comfortably fit the PST 2.5-10 though:
The SW version is 15 bucks more than the S, but they are both cheaper than the cantilevered versions.
This is personally what I would go with, the SW mount will be more rigid anyways.
http://theshootingedge.com/store/index.php?main_page=product_info&products_id=548