Real rifle infomation;
The M16 rifle is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-round magazine.
In 1964, the M16 entered US military service and the following year was deployed for jungle warfare operations during the Vietnam War. In 1969, the M16A1 replaced the M14 rifle to become the US military's standard service rifle. The M16A1's improvements include a bolt-assist, chrome-plated bore and a 30-round magazine.
In 1983, the US Marine Corps adopted the M16A2 rifle and the US Army adopted it in 1986
The M16 has also been widely adopted by other armed forces around the world. Total worldwide production of M16s is approximately 8 million, making it the most-produced firearm of its 5.56 mm caliber.
 
FEATURES

Airsoft replica of Vietnam type US rifle from full metal jacket. Full metal model 602 style front set with;
Duckbill Muzzle Brake
Full Metal One Piece Type Reinforced Outer Barrel 
M16VN Style Metal Receiver 
Vietnam War Era 20rds Style Magazine 
Reinforced M16VN Motor Grip with Heat Sink End 
 
PACKAGE INCLUDES :
1 M16VN Metal Body ( GP185 )
1 M16 VN Type Magazine ( 110rds ) ( GP213 )