The first GBB airsoft weapons were powered by R-twelve, a liquid propellant and CFC gasoline generally used in car air conditioning and refrigerators being a cooling agent. Once CFCs were discovered to induce severe damage to the Earth’s ozone layer and became banned substances, gasoline airsoft guns stopped using R-12 https://andresdxeta.designertoblog.com/64277360/detailed-notes-on-new-holland-l-series