Re: 50cal CQB?!!!!!
Most .50 cal rifles and ammo are not that accurate. If someone percieves a need for an anti-material rifle, something like this small red dot would seem more reasonable than a big heavy, high magnification scope. Optics help you see better, not necessarily help you shoot better. How hard is it to see a car? A bus engine? Not very. Putting a .50 cal round into a truck engine to shut it down would be easy to do within 200 with this setup.
I'm not a fan of this type system for LE use - too much potential liability in the case of a miss, but just because I don't see a need doesn't mean someone else doesn't have a use for one. It just seems like it is really expensive to use and practice with, and the range of uses is extremely narrow. Plus, frankly, I wouldn't want to practice with it much.