This is the NUPROL Delta AK21 AEG Pro Airsoft Gun…

DETAILS:
6.03MM STEEL TIGHTBORE BARREL
QD SPRING CHANGE GEARBOX
FULL STEEL TOOTHED PISTON AND GEARS
REINFORCED V2 METAL GEAR BOX DESIGN
METAL REINFORCED SELECTOR PLATE
CNC FINISHED RECEIVER WITH QPQ FINISH
SAFE – SEMI – AUTO FIRING MODES
LIPO BATTERY READY
METAL SLING PLATE INCLUDED

DELTA AK-21 AEG model –
POWER: 340FPS WITH A 0.2G BB ( /-5%)
BATTERY: 8.4v NiMh / 7.4v LiPo
MAGAZINE: CAPACITY: 370RDS (6MM BB)
MODE: SAFE / SEMI / FULL AUTO
GEARBOX: FULL METAL/MICROSWITCHED
MATERIAL: CNC ALUMINIUM/POLYMER
FINISH: QPQ TREATMENT
MOTOR: HIGH TORQUE FLAT MOTOR
HOP UP: ADJUSTABLE

PLEASE NOTE: BATTERY AND CHARGER ARE NOT INCLUDED.
We recorded the following batterie and charger of this gun.
Battery: 1450 7.4v Nuprol Power Lipo Battery
Charger: Nuprol or WE Lipo Charger