I never had a AR 15 before. When I buy something I like to buy it good. If I don't, it wont be long before I outshoot it, out ski it, out drive it, or whatever. This is the upper someone else reccomended from another message board. Please give my your thoughts or comments. Tell me what you like or dislikes about it. Pick it apart please. http://www.bravocompanyusa.com/BCM-...-Receiver-Group-p/bcm-urg-18 ss410 vtrx13.htm I have a bunch of .223 in 55 gr and a little in 62gr. I also have a few 5.56 62gr. I've always been one to lean towards the extra barrel length and weight for accuracy. You can also give me your guesses on what type of MOA it shoots, versus something shorter and lighter? Also reliability of this in heavy repeated firing? I don't know if it's a tight chamber or what? Or if this is better for .223 or 5.56, or be more prone to cause problems w/ one or the other. The guy that reccomended this, said that sometimes they drill gas ports in the wrong places. I no nothing about these, but I used to work as a basic machinist and a upscale welder for years. So my mechanical abilities are above average.