It's the most fun AR I own. Mine is a 2 stamp gun with a Form 1 suppressor. I've got it zero'd at 15 yards, but it holds decent groups out to 100. I've had it for several years now. It was my first foray into the NFA world.
They are so much cheaper to build now than when I built mine. I just helped a buddy build one with a 4" barrel, SBA3 brace, and flip up iron sights, and he was all in for about $600, I think.