Oh don't get me wrong I'm not saying they aren't worth it, when I go down that road I will be buying a Ron's upper. I have emailed slrrifleworks about the dedicated lowers he is working with Ron to build for his uppers. I want one to form 1 to a sbr. I can only imagine the R&D he had to go through to get a DI .45 to run reliably. I guess I should have specified its a little much for ME right now.Yes, but before you write his off as too expensive, you might want to read this detailed (and pic heavy) report. It lays out a few reasons why his are worth the extra coin.
http://www.m4carbine.net/showthread.php?t=110653