Tokyo Marui M4A1 Boys HG Airsoft AEG Category_SMG Case All ERG Series rifles feature All ERG Series rifles feature a mechanical electrical cut off system that works in conjunction with the ERG magazines to feed every BB and stop firing when the magazine is empty Magazine Capacity: 30 Rounds 70% Scale M4A1 Boys HG Airsoft Electric Gun AEG Rifle Item Weight (gram) 885 Major Color Black Length 650mm 724mm (Extended) Hop up Adjustable Shooting Mode Semi Fully Automatic Gearbox Type N A Fit Battery Pack N A Barrel Thread Type N A Magazine Capacity 180 Bullet Type 6mm BB Power (Muzzle Velocity) 130 FPS Auto Firing Rate 600 ~ 900 Rounds per Minute Manufacturer Tokyo Marui TM