This replica is full metal and features moving parts, removable magazine, and removable grenade.
 
The M16 rifle, officially designated Rifle, Caliber 5.56 mm, M16, is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. In 1964, the M16 entered US military service and the following year was deployed for jungle warfare operations during the Vietnam War. ThIn 1969 the M203 was designed as an under-barrel device attached to an existing rifle.