The Well R2/G294 Scorpion SMG is a lightweight, semi-automatic, CO2-powered airsoft submachine gun replica of the Czechoslovakian Škorpion vz. 61. It is primarily constructed from a durable polymer with some metal alloy parts, including a folding metal stock. 
 
Key Features and Specifications
Propulsion: CO2 powered, with the 12g cartridge inserted into the pistol grip using an included Allen key.
Fire Mode: Safety and semi-automatic only (despite some instructions mentioning full-auto).
Muzzle Velocity: An impressive 460 FPS (feet per second) using 0.2g BBs.
Magazine Capacity: A 13-round removable magazine is included, with an individual serial number on the side of the replica.
Construction: The body is tough polymer, with metal parts for the folding stock and some other components.
Weight: Very light at approximately 390g.
Length: Measures 270 mm when folded and 520 mm with the stock extended.
Sights: Features fixed front and rear sights.
Hop-up: A wheel-based adjustable hop-up unit is accessible by pulling back the charging handles.