I'm about to pull the trigger on this upper and a BCM chargin handle. http://www.bravocompanyusa.com/ProductDetails.asp?ProductCode=BCM-URG-MID-16+BFH+DDL9&CartID=1 I have a cheap red dot at home that I used on my ar15, but I never got too many rounds through it before the lower receiver cracked. I got a new lower which looks like ass with my carbon15 upper. I looked for a rear sight for this upper, but the only one I found that works with an F stamped front sight is the carrying handle. You guys have any suggestions / tips?