This airsoft gun comes with a quick change spring system allowing you to quickly upgrade or downgrade the FPS (Feet per second) rating of the gun with ease Although they are pre set to 1.0joules at 310-328ft/sec. This AMOEBA style rifle is part of ARES's new EFCS gear box system (Electronic Firing Control System), which allows the gear box to be programmed to be Semi, 3 round burst or full auto using the Ares Amoeba Electronic Gearbox Programmer EFCS. The new EFCS gear box system means the AEG rifle comes with an electronic trigger, meaning an even quicker trigger response.
This Airsoft Rifle DOES NOT come with batteries or charger (these are available seperately  1x Battery and 1x Charger £49.95)
Features: 
Programmable with Ares Amoeba Electronic Gearbox Programmer EFCS
ARES EFCS Gearbox
Electronic trigger
9'' Barrel
7'' Polymer RIS rail
Quick change spring system
QD mount on stock
'Stippled' effect pistol grip
Front flip up iron sight
Clockwise threaded outer barrel
Magazine has built in magazine pull
Package Includes:
Amoeba AM-008 M4 Carbine
Rear Sight
Magazine
User manual
Cleaning Rod