Backdraft Phoenix M4 HPA Engine
Backdraft Phoenix M4 HPA Engine with FCU Long Form - (Orange) Features Complete HPA engine system for M4-style gearboxes Delivers over 40 rounds per second for extreme firepower Operates within a flexible PSI range of 40 to 130 for tuning precision Integrated adjustable solenoid for fine-tuned performance Supports on-the-fly fire mode adjustment without tools Built for high performance with minimal maintenance Engineered for high reliability in demanding conditions Modular FCU (Fire Control Unit) included for advanced programming Includes M4 trigger board for drop-in compatibility with standard M4 gearboxes Comes with a wire harness available in grip or stock length Includes inner grip air line with durable brass quick disconnect fitting Excellent value HPA system with full-feature capabilities at a competitive price