A rmr mounted too a pistol has a little bit of a learning curve but once you learn it you will be pleasantly surprised just how much faster it is.
They can't out in decent numbers about the time the market started dropping. I think they decided to start dealing direct too because all my distributors started clearing them out at significant savings over normal dealer cost. Not sure how the alloy compares to the bcm. Had actually looked at the kmr for this but the ap was several ounces lighter.
I ended up with the 9 moa model. It's bounced around between a couple platforms. Like it for 50 and in. Would just pay a little extra for an aimpoint micro for anything past 50. Haven't tried the led models.
Since I didn't see a response where anyone actually HAD an rmr on an ar I will chime in avtech. I am running an rm06 (3.25 moa led adj) as a primary on a palmetto and like it very much. I have it mounted directly in front of the rear backup sight. It has the triji riser mount and gives me absolute cowitness with a2 post. Very rugged and fast. I would highly recommend if you want a light carbine. I used the rifle recreationally and in the ga swamps as a pig rifle. Optic shines there as well. Edit....I guess first responder had one on a .300. My bad.
Most pics I've seen had the mount forward, that's why I mentioned it. I just like the glass closer to my eye for less obstruction around the target. Also when carrying the carbine I have my left thumb over the forward receiver rail. So a rear mount clears this area.
Anybody else? I'm along the lines of Midnight for the optic to the rear.