This really is a wonderful all-all around rifle, nearly great as it arrives, especially when compared with many of the other AR-15s on our record. The only real potential upgrade I might look at creating will be the trigger. They're also super reliable. Glock’s major advantage is aftermarket support, but https://redgearguru.com/history-of-the-colt-m1903-32-acp-tactical-handgun-top-ranked-firearms-2/second-amendment-faqs-guns-handguns-rifles-pistols-shotguns-firearms-55/