The Colt M4 is a spot-on .22 LR replica of the current carbine version of the M-16 machine gun issued to U.S. military. The Colt M4 Carbne Semi-Automatic Rifle in .22 LR is manufactured exclusively by Walther under license from Colt, making it the only genuine Colt tactical rimfire replica available in the world. These replica rifles have a rifle-length barrel, a collapsible stock, and a removable carry handle. As with the original, the upper and lower receivers are made of high quality aluminum. Additional features include: a windage-adjustable rear sight, an elevation-adjustable post front sight, a threaded muzzle and steel flash suppressor, a bolt catch, and a functioning dust cover. This rifle comes with the original factory box. Its stock, metal, and bore are all in very good condition.