The 
WE SMG-8 Gas Blowback SMG in Black
 is a compact and lightweight airsoft submachine gun, known for its realistic blowback action and suitability for close-quarters battle (CQB). It is inspired by the Heckler & Koch MP7 platform but features an original design by WE Airsoft. 
 
Key Features and Specifications
System: Gas Blowback (GBB) with an open-bolt design, providing realistic recoil and cycling action.
Construction: High-strength, fiber-reinforced polymer body with a full-metal barrel assembly and internal parts, offering a balance of durability and light weight.
Controls: Fully ambidextrous fire selector (safe, semi-auto, full-auto), magazine release, and bolt release, catering to both left and right-handed users.
Stock: A retractable, 4-position stock that adjusts the overall length from approximately 419mm to 645mm.
Accessory Rails: Features a full-length 20mm Picatinny top rail for optics, a short bottom rail, and two additional side rails included in the box for mounting various accessories.
Sights: Comes with integrated flip-up front and adjustable rear iron sights.
Power Source: Operates on green gas, red gas, or propane.
Magazine Capacity: A heavyweight, full-metal magazine holds approximately 40 to 44 rounds of 6mm BBs.
Muzzle Velocity: Typically ranges from 330–400 FPS (Feet Per Second) using 0.20g BBs, depending on the gas type and ambient temperature.