The SG550 is an assault rifle manufactured by Swiss Arms AG (SG is an abbreviation for Sturmgewehr, or "assault rifle").
The rifle is based on the earlier 5.56 mm SG540 and is also known as the Fass 90 (Fusil d'assault 90 / Fucile d'assalto 90) in French / Italian or Stgw 90 in German (Sturmgewehr 90).
The SG 550 is a selective fire rifle and features a proven gas-actuated piston-driven long stroke operating system.

Features:
Metal Cocking handle exposes hop-up.
Air Regulator with Removable Plunger.
Adjustable Hop-up System.
Semi/Fully Automatic Shooting Mode.
To be a fight CQB, field and use it as a sniper.
Built-in Foldable Bipod.so you can quickly go from the sniper position to a field position.
With Clear “Jing Gong” Logo at Receiver.
110mAh 8.4v Standard Battery(SD Type) stored inside the Front Handguard.
Ready to go for 350FPS without modification.
Trigger Guard can be pushed side ways to the right (Useful if you are using really thick gloves this winter).
Front Sight can be change to a night-sight by turning it up.
Full Windage and Elevation Adjustments Rear Sight with 4 different type of aperture.
Two Sling Mounts one on the bottom of front sight, the other on the bottom of rear sight which can be installed with single point or 2-point tactical sling.
Equipped with Foldable Stock and safety lock.
Non-Slip Textured grip.
Included 500 Rounds Hi-Capacity Magazine.

** Please note that Battery and Charger are not inculded **

Specifications :
Length : 755/1000mm
Barrel Length: 534mm
Shooting Mode :Semi/Fully-Auto, Safe
Hop-up : Adjustable
Weight (Gram): 4354(With Box)
Color : Black
Battery: Advise using 110mAh 8.4v Standard Battery(SD Type)
Magazine Capacity : 500rds
Materials : Metal & ABS Polymer
Bullet Type : 6mm BB
Power (Muzzle Velocity) : 350FPS
Manufacturer: Jing Gong