anybody else seen those monolithic uppers from aero precision? my buddy just ordered one last week, pretty cool. i'm still on the fence as far as monolithic uppers go, on the upside, you don't have to worry about buying quadrails separately, but on the downside, during rough field use, if you ding up the rails at all, pretty much the whole upper is shot, but with this aero design, the rails are removable, so if you jack one up just pull it off and order a replacement, the whole upper kit comes with, upper, screwdriver, manual, and a handfull of rails, the possibilities are endless. pretty cool, if you have not seen them yet i highly recommend at least giving the a quick browse.