AIRSOFT SPRING & CO2 AIR GUNS are styled after some of the world's most famous firearms. Air Powered handguns are true to scale and easy to operate. How they work... Pull back the slide (just like the real firearm they are modeled after) to charge the firing mechanism. Aim and fire. CO2 Air models require a CO2 cartridge (not included) and Spring Air models must be manually cocked each and every shot. Because of their maintenance free design and affordability these are excellent entry level AirSoft guns for the hobby and recreational enthusiast.