I had a Burris Fastfire on top of my compact acog for cqb work on my ar-15. i was not happy with the burris and wanted something i didnt have to worry about breaking. The RMR fits that well, but the amber dot is hard to see in the dark, tritium barely lights up, and can get washed out in bright light. if you are only shooting during the day and not in combat this sight will work well, but if you might be room clearing, or using it to depend on, I would not buy it. I will be returning/exchanging for the led red dot RMR.
Pros: Rugged
Cons: Can't see well in darkness
This review was written in the old system and had content requirements that are different than reviews written today.