Stupid Airsoft gets an upgrade kit by Tapp Airsoft designed for the GHK G5 gas blowback airsoft rifle. This custom lower receiver allows the replica to run on high-pressure air (HPA) while utilizing ASG Scorpion Evo magazines. By combining these systems, the modification aims to merge the consistent performance and cost-efficiency of HPA with the realism and tactile feedback of a traditional gas blowback platform.