PolarStar F1 HPA Electro-Pneumatic Airsoft System (M4) w/ Full-Size FCU

Upgrade your airsoft experience with the PolarStar F1 Airsoft Engine – a high-performance system designed for Ver. 2 M4 gearboxes that combines precision engineering with user-friendly innovation. Built from lightweight yet durable machined aluminum alloy, this compact engine delivers exceptional reliability while reducing weight for enhanced portability and control during gameplay.

Engineered for hassle-free maintenance, its tool-less design allows quick field adjustments without sacrificing performance. The Delrin nozzle ensures consistent airflow, while compatibility with battery packs ranging from 7.4V to 1.08V (optimized at 7.4V-8.4V) provides flexibility across setups. The fully adjustable Flow Control Unit (FCU) lets you fine-tune rate of fire, burst settings (2-9 rounds), and selector modes for precise control tailored to your playstyle.

Innovative features include a custom MAC solenoid that enhances efficiency and compactness, alongside a dual-purpose flow control system that regulates nozzle speed and enables two-stage firing modes – boosting cyclic rates while ensuring smooth chambering for every shot. With only five moving parts and advanced design principles, this engine minimizes wear and tear while maximizing uptime between maintenance sessions.

Perfectly compatible with most Ver. 2 M4 gearboxes, the F1 system includes everything you need for installation: the engine unit itself, FCU with wire harness, trigger board, and dedicated air supply line – streamlining setup for seamless integration into your rig.

Whether you’re competing in field matches or enjoying backyard skirmishes, the PolarStar F1 Airsoft Engine offers unmatched precision, adaptability, and durability – making it an essential upgrade for serious airsoft enthusiasts seeking cutting-edge performance without compromising on ease of use.