Features SSS.III E-trigger system for better trigger response and efficiency Smart Trigger & Pre-cocking Function Competition style short-stroked flat trigger Lightweight M-LOK Polymer Handguard High capacity battery space ERGO stock Master Mods AL6061 cylinder head, piston head, & air nozzle Master Mods hop-up tensioner nub ICS unique split gearbox design to simulate a real firearm and allows quick maintenance with quick-change spring guide Realistic forward assist with spring release function Lightweight aluminum outer barrel Manufacturer: ICS FPS Range: 320-340 Specifications: Length: 770mm - 844mm (Adjustable)Inner Barrel: 263mmWeight: 2381gThread Direction: 14mm NegativeGearbox: Ver 2 Full Metal ICS Split TypeMotor: Long TypeFire Modes: Semi/Full-Auto, SafetyBattery: 7.4v Stick LiPo Type recommended (Battery not included. Wired to the rear with standard Deans connector)Hopup: Yes, AdjustableMagazine Capacity: 300rd Hi-Capacity. Works with Matrix, G&G, Tokyo Marui and other compatible M4 / M16 Series Airsoft AEG MagazinesPackage Includes: Gun, Magazine, Manual