PolarStar Airsoft F1 HPA Electro-Pneumatic System with Full Size FCU for M4/M16

Shipping calculated at checkout.


  • Manufacturer: PolarStar
  • Construction: Aluminum Alloy
  • Compatibility: Most Version 2 M4 Gearboxes
  • Overall Length: 4 inches


  • Machined aluminum alloy construction provides superior durability and lightweight design
  • Tool-less design makes in the field maintenance simple and hassle free
  • Delrin air nozzle that lightweight yet highly durable
  • Can be used with batter packs between 7.4v and 1.08v (7.4v - 8.4v recommended)
  • FCU allows for rate of fire, max semi-auto, and selector mode adjustments
  • 2-9 round burst capability
  • MAC manufactured custom solenoid makes the F1 system more compact and efficient
  • Dual purpose flow control system allows for nozzle speed regulation and two-stage firing, increasing cyclic rate, and smoother chambering
  • 5 moving parts offers extreme reliability and makes maintenance easy
  • Compatible with most version 2 M4/M16 gearboxes

Package Includes: 1x F1 Engine, 1x FCU, 1x Trigger Board, 1x Air Supply Line, 1x FCU Wiring Harness