I think the people that ordered from Brownell's have a legitimate gripe. I suspect they ordered from them for a couple of reasons.
1. Their price $499
2. Their reputation
So far I have heard nobody say they have received one from Brownells. Other dealers have been getting them in bunches of 12-18. Mine has a factory sticker date of March 13 and I was shooting it on March 16 along with the 17 other people that had a small deposit to get on a list at my LGS.

Brownells has caught a lot of flack for not being able to fill orders while so many others have and I would be reasonably sure they wish they would have never taken any pre-orders for this gun.