This is the airsoft version of the APX pistol made by Beretta Firearms. This gun has a full metal slide an a sturdy polymer lower frame. Authentic Beretta trademarks are engraved into both the slide and the grip. The CO2 is conveniently housed inside the pistol grip. It has a functional safety and slide catch. The slide shoots back with each shot fired, and will lock back after the last BB. It is semi-automatic and will fire as fast as you can pull the trigger until the mag runs out. The magazine holds 15 BBs and extra magazines are available to purchase if needed. This gun uses 12g non-threaded CO2 cartridges which are sold separately. At 310 FPS with 0.20g BBs this gun is legal at most fields and makes a great sidearm.