The upper can be a flat major, needless to say, and comes along with each of the standard Mil-Spec enjoyable stuff similar to a dust deal with and forward guide. AR15.COM is the world's premier firearm Local community and is particularly a collecting place for firearm enthusiasts of every type. https://colt-smg-upper63962.collectblogs.com/72301652/the-5-second-trick-for-colt-smg-upper