I wanted to point out why this flash suppressor cost so much, and why KAC parts in general cost so much. KAC has commented on this before, and the reason their parts are so expensive has to do with their government contracts. They can not sell contracted parts for less than what the government is buying them for. This is the reason why so many of their parts seem to have outrageous prices.
This is a well made flash hider, like most KAC parts. You just have to determine if it's worth the mark up or not.
I know I may get a lot of heat for this, but I don't think this should cost that much. My friend has the KAC QD on his AR and I have the Troy Medieval Muzzle Break. I like how his looked and it was well built. However, in my opinion it was like buying the Cadillac Truck. I don't see spending this kind of money when there are numerous other flash suppressors and muzzle brakes that are just as high quality and they won't cost you so much.