Download video: Convert Airsoft GBBR and GBB Guns to HPA in 10 Seconds
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Airsoft on green gas? Say bye bye to green gas and propane. They are expensive, smelly and not healthy. Use HPA! Here is a 10 seconds mod you can do to your GBB and GBBR to make them fire with HPA setup and you can enjoy clean air as you shoot! Way healthier than shooting green gas and propane!