This is the newest Jing Gong M4F Carbine AEG version. This TM/CA replica comes with a metal gearbox, LE stock, and barrel.  Its solid ABS construction means it will stand up in rugged conditions. Designed to model the M4 Carbine, a choice weapon for US Troops serving home and abroad, the JG M4F is sure to be your favorite AEG on and off the play field.

Mil Specs:

• 1:1 Scale Airsoft Electric Gun (NEW Black Gear Box Version)
• Solid ABS plastic frame, hand guard, and hand grips.
• Metal barrel, front and rear sling mounts, front sights and trigger.
• Solid Folding Metal stock for Close Quarter Combat.
• Working Charging Handle
• Metal Gearbox, Version 2
• Adjustable Hop-up
• Fire Modes – Auto, Semi, & Safe
• 440+ FPS With .20G BBs
• Magazine – 300 Round High Capacity (metal wheel ratchet type)
• Weight = 7.5lbs, length (extended) = 34”
• Battery 8.4V,  1100mAh (AC 110v 60Hz/DC 8.4v 250mAh Wall Charger included)
• 3.5 hour charge time
• TM/CA accessory compatible
• Great for Military and Law Enforcement training engagements.  An Awesome AEG for Airsoft competitions.

The M16 was an initial version first adopted in 1964 by the United States Air Force (USAF). The U.S. Army began to field the XM16E1 en masse in 1965 with most going to Vietnam. The US Marine Corps also adopted the system during this period. The XM16E1 was standardized as the M16A1 in 1967. This version remained the primary infantry rifle of the United States military from 1967 until the 1980s, when it was supplemented by the M16A2. During the early 1980s a roughly standardized load for this ammunition was adopted throughout NATO (see: 5.56 mm NATO).

The M16A3 is a fully-automatic variant of the M16A2, issued primarily within the United States Navy. The M16A2, in turn, is currently being supplemented by the M16A4, which incorporates the flattop receiver unit developed for the M4 Carbine, and Picatinny rail System. M16A2 are still in stock with the U.S. Army and Marine Corps, but are used primarily by reserve and National Guard units as well as by the U.S. Air Force.

(Courtesy of Wikipedia)