I have a Colt 6721 that is a very nice rifle. Only complaint I have is the stock trigger. Is there anyone that has any experience with chip's trigger group. I called them and they siad it would be a difference between nite a day. They said all our special op's guys are using it over in the sandbox. Im thinking about giving it a try, but wanted to hear some opinions first. Also if anyone knows of a better trigger let me know.