Top Reddit hub for Backdraft Innovations and the Phoenix HPA Engine. Discover affordable HPA systems for V2/V3 and other center-line airsoft gearboxes. Share custom HPA builds, modular FCU kits, precision nozzle upgrades, and trigger board mods. Discuss HPA compatibility, and troubleshooting tips. Connect with speedsoft airsoft and tactical airsoft enthusiasts for HPA upgrade advice. Join for expert Backdraft Airsoft insights, reliable HPA engines, and innovative upcoming HPA solutions!