I don't run a rear sight on any of my scoped AR's, and I still use a PERP type mounth. Burris has this mount in QD fashion, which is probably what I would suggest since you want the QD ability. If you want a set and forget mount, I've found the COOP mounts in both 1" and 30mm on Amazon to be of a great value! I wouldn't recommend the Nikon P223 mounts unless you want to set ip and forget it because they slide over the rail from one end or another making it nearly impossible to remove them unless you remove the scope from the mounts first. I do have a couple rifles with the P223 mounts, but they are mounted on top of a pair of 1/2" truglo risers, and this requires a cheek riser to accommodate the extra height.

There are other QD single piece mounts for the AR other than Burris that are lighter, but generally quite a bit more expensive.

__________________
Rod
M&P 22A, 40c, 15A, 15-22