Quoted:
I bought my 20" upper back in May, and when I tried to zero it, I noticed that the front sight post needed to be raised above the ears of the FSB. This was little more than annoying for a while, and the rifle shot very well otherwisw, but when I started trying different ammunition, the change in point of impact made it so that I could not zero the rifle without raising the post even further past the ears of the FSB.  My guess is that the F-Marked front sight base was mis-marked as "F". At 50 yards, it would shoot 6-8" above the POA, and I got tired of playing with hold overs.

I had read a lot about Bravo's attention to detail and focus on quality and customer service, so I sent an email and got a shipping label. I sent it back, and just had it returned to me.

Well, I don't know about the front sight's elevation issues, but now the front sight is canted about 5 degrees to the left. Needless to day, I am unhappy.