The first GBB airsoft weapons were powered by R-12, a liquid propellant and CFC gas generally used in automobile air-con and refrigerators to be a cooling agent. Once CFCs were discovered to cause severe harm to the Earth’s ozone layer and became banned substances, gas airsoft guns stopped using R-twelve https://pellet-guns-for-sale98559.blog-kids.com/33154067/detailed-notes-on-new-holland-l-series