Stupid Airsoft tries CO2 power chambers on the Action Army AAC-C1 to find out how much power it can produce. The initial green gas test showed weak performance, yielding low muzzle velocities of around 250 FPS and suffering from inconsistency due to gas cooldown. The experiment then shifted to the CO2 shells, which are color-coded (M130, M150, M170) and use smaller 8-gram cartridges to release escalating amounts of gas.

The CO2 tests demonstrated a massive power increase, starting at about 290 FPS for the M130 and climbing to a maximum of 441.7 FPS and an extremely high 9.67 Joules with the M170. Whilst the CO2 system offers better consistency and performance in colder weather, he says that the high-powered M150 and M170 chambers produce a Joule output far exceeding the safety limits of most airsoft fields.