I use Aimpoint Micros on my stuff , I took advantage of the sale in 2010 and went all in, use on my 15-22 and 5.56 and also my M930SPX could not be happier. Obviously not everyone can use an almost $600 red dot on one if not all of their shooters.

If i needed another red dot I am quite certain I would buy either the Bushnell (as I have had a lot of success with Bushnell stuff in the past) or definitely the Primary Arms, they are great people an d very helpful on the phone and everyone loves their stuff.