I don't do aftermarket AR's. Haven't since I was a young poor GI. Everything I have is factory Colt (I would consider an FN though} I am building a new SBR and have been running to this company "Colt Competition" is there anyone that can tell me who or what that is? I am suspect of brands that attempt to trade on someone else's good name. The information on the internet is unclear. It might be like my favorite German knife company (Puma) making a line of products in China so they can compete in a lower price point market?