Derp... My bad...I should have better read it.
The PEPR is good but I found that the additional top rail mount is a little high if you want to put a mini RDS on it. I have my RDS mounted, angled 45 degrees to the right using a weaver scope mount. Using the RDS is easier since I can maintain my cheek weld and just tilt the rifle slightly to the left. With the top mounted RDS, I had to lift my head off the cheek weld to use it.
If you're trying to hit long range targets, a mount with a 20 MOA angle will give you some additional elevation. If you're not intending to mount/unmount the scope at all ,I'd recommend the Nikon M-Series XR range (they now come in 1" and 30mm sizes). They cost under $90 and come with a 20 MOA cant, but the only drawback is you cannot unmount it and re-mount it without needing to re-zero.
I'm currently running a weaver 20moa riser with Leupold QRW "low" 30mm rings so I can switch stuff around quickly without needing a re-zero.