1:1 Scale High Power Assembled Gas Powered GBB Airsoft H&K (HECKLER & KOCH) Licensed Authentic Marking on SMG - Reinforced ABS body, Receiver Grip and the Folding stock  - Metal 200mm One-Piece Outer Barrel  - Metal Housing UMP 30 rounds Loading Capacity Gas Magazine  - With Three 20mm Side Rail - Length: 115mm, For Attach on Handguard . - With 20mm Top Rail - Length: 158mm - Adjustable rear sight  - Cocking Handle can be locked & released - Caliber / Ammo: 6mm BBs - Capacity: 30 Rounds BBs - Energy: 1J - Velocity: up to 100m/s with 0.20g BBs - Drive: Semi-Auto, Full- Auto - Barrel Length: 210mm - Dangerous area up to: 150m - SMG with Mag Net Weight: 2214g - Length: 450-693mm