Guns in this category are operated with CO2 cartridges. They have much more pressure than gas thus an improved performance is achieved. Some models have a very high precision and reach (> 70m). CO2 guns are made of metal to withstand the increased wear & tear. If the product name or the product description says "CO2 & Gas", this indicates that this weapon can be operated with gas and also with CO2, which increases the possible fields of use and thus flexibility. For gas or CO2 use different magazines as required since the gas magazines have a tank and the CO2 a space for holding the CO2 cartridge.
A big advantage of the CO2 guns is that CO2 works without problems in cold environments, therefore these models are also recommended for winter. In addition, some manufacturers reduce the power of their guns so that acceptable speeds of 350 FPS are reached in ordert o copmply with international and national Airsoft competition rules.
The mechanical part of the gun should be maintained from time to time by taking off the slide and applying silicone oil. Oil products for genuine firearms should not be used because they contain substances which can harm the airsoft gun. Unless noted to the contrary in the product details all weapons are generally semi-automatic.
All guns are supplied without CO2, the cartridges must be purchased separately.