Umarex H&K MP7A1 SMG GBB (Black) by KWA Discount Counter Clockwise 14mm is able to Counter Clockwise 14mm is able to attach any barrel extension tube (sil 4V 1300mAh Ni MH Mini S Type Fit Battery Pack Mini Handguard (Nickel Li Po) Barrel Thread Type Counter Clockwise Barrel Thread Diameter 14mm Magazine Capacity 82 Rounds 30 Rounds Bullet Type 6mm BB Power (Muzzle Velocity) 270FPS Auto Firing Rate 750 ~ 850 Rounds per Minute Gas Blow Back Submachine Gun with Fully & Semi Automatic Shooting Mode Item Weight (gram) 2140 Major Color Black Length 380mm 590mm Barrel Length ~165mm Blow Back Yes Hop up Adjustable Shooting Mode Semi Fully Automatic Other Power Source Gas (HFC134a or HFC22) Magazine Capacity 40 Rounds Bullet Type 6mm BB Power (Muzzle Velocity) 400 FPS (Top Gas Test @ 25°C Room Temperature) 320FPS (HFC134a Test @ 25°C Room Temperature) Manufacturer KSC Package Includes UMAREX MP7A1 SMG Airsoft Gun (H&K Licensed)