The Colt M4 Carbine is a spot on .22 LR replica of the current carbine version of the M-16 machine gun issued to U.S. military. It features a carbine length barrel, a collapsible stock, and a removable carry handle. As with the original, the upper and lower receiver are made of high-quality aluminum. The Colt M4 Carbine in .22 LR is manufactured exclusively by Walther under license from Colt and is the only genuine Colt tactical rimfire replica available in the world. The M4 features a front sight that's an elevation-adjustable front post sight and a windage-adjustable rear sight. The muzzle is threaded and fitted with a steel flash suppressor.