JG Airsoft M4 S-System Full Metal Gearbox Desert Tan AEG Rifle w Integrated RIS and High Performancebr Manufacturer Jing Gong JG Airsoft CSI Electric Powered br Metal Gearbox Gearbox Version 2 Metal SemiFull Auto Firing Modes br Overall Length 315 Magazine 300 Rounds br Adjustable front rear sight Adjustable hop-up system Collapsible Rear Stock br Battery And Charger Included