One of the most popular weapons used on the modern battlefield, the M4 and M16 series rifles date back to the Vietnam War era. This weapon series has seen many variations and improvements in past years, making it the weapon of choice for NATO forces worldwide. SRC brings you its Airsoft version of the M4/M16 Rifle, the SR4 Series Airsoft Electric Gun. SRC SR4 series Airsoft Electric Guns feature metal bodies, nylon fiber handguard , pistol grips, stock ,and highly reliable and rugged SRC Gearbox technology. The SR4 AEG series is designed to handle the rigors of today’s Airsoft battlefield. The solid metal bodies, nylon fibers grips and stocks, and high end internals will ensure you can handle the toughest Airsoft field conditions