From my experience with OKO's, they are less reliable than Cmore's, that's for sure.
Depending on the generation of your docter, the latest Gen', IV, has proved to be the most resistant of them all. All the others had major wiring issues, and simply stopped working after awhile. Trijicon just came out with a version of their docter sight, and even cmore are working on one(There's a thread about the STS).
For a mount, try to find one or create one from Carbon fiber(SVI's mount and tanfoglio's are good examples).
There is a Cmore from aluminum, but it has some more weight to it.
Aimpoint has a micro version of their famous sight and there are currently many aftermarket mounts for it.
Magwells - SPS has a matching 2011 grip with an integral magwell. It's a bit thicker(Trigger guard)than the normal 2011 STI/SVI ones, but it might work for you.