Pro’s: CO2 Airguns allow for fast repeat shooting, great for action shooters, generally CO2 Airguns will supply a medium power range. No need to pump or cock your CO2 powered weapon in-between shots and a CO2 power source can allow for a very realistic action of the gun you are shooting. Con’s: CO2 Airguns require the additional cost to buy the CO2 as they do not function without it. CO2 Airguns have a limited power output and lose power as you shoot and use up the CO2. CO2 Airguns are effected by hot and cold temperatures and will have less power in colder temperatures and may not even work in super cold environments. Read more pros and cons and the full article here: https://www.replicaairguns.com/2016/12/8/airgun-power-source-pros-cons.html