The WE M9A1 C02 GBB pistol replica was made mostly of metal. Only the pistol grip cover panels are made of plastic. The pistol grip is widened and rubberized what allows for a secure grip even if the shooter has wet hands. There is a USMC-like logo on the pistol grip.

The pistol is equipped with the Blow-Back system, which adds realism while shooting. After the last shot, the slide blocks in the backwards position just like in the real firearm. There is a comfortable ambidextrous thumb safety lever in the back of the slide. The replica is equipped with an integrated RIS rail located under the barrel, which allows the mounting of a tactical flashlight or a laser. The replica is also equipped with an adjustable hop-up system. In order to gain access to the hop-up system, you need to remove the slide. The magazine is also made of metal, and it holds 26 BB pellets.