All new A&K M4 S-System airsoft rifle is 1:1 scale replica of the famous assault rifle that is in use with the U.S. Military today. It comes with a retractable stock that makes this gun great for CQB and outdoor. The working charging handle gives this gun a realistic action that even higher priced guns like CA do not have. The S-System also has flip-up sights that fold down to give optics an unobstructed view. It also features an exclusive rail system that has a rail that bridges the traditional gap between the handguard and the receiver.


  • M4 S-System
  • Full metal barrel
  • Full metal RIS Rails, Sights, Magazine, trigger, and Battery Compartment.
  • Rechargeable battery & charger
  • 1100mAh – 8.4 volt battery
  • (3) Metal R.I.S. Rails
  • R.I.S. Forgrip Included
  • 300 Round metal magazine included.
  • .20g BBs required for this gun
  • Metal sights can fold down to allow for a scope to be added to the top RIS rail. Both front and rear sights are fully adjustable.

Make/Model: A&K M4 S-System Airsoft AEG Rifle

Manufacturer: 7799

Item #: A&K 7799

UPC Code: 

Type:  Electric Automatic

Velocity: 350 FPS

Shooting Mode: Semi-automatic and Full-automatic


Magazine Capacity: 300-round high capacity (gear wind-up) with 6mm 20g BB2

Weight: 9.5 pounds

Length: 34 inches

Color: Black

Shooting System:  Hop-up