
PolarStar F2 M4 Conversion Kit | V2 HPA Unit | HPA Drop in Kit
PolarStar F2 Conversion Kit, M4/M16 Made in the USA Estimated Velocity: 480fps w/ .20g @ 145psi (varies based on barrel and hopup) Air Efficiency: 1000+ shots from 13/3000 @ 1.5J w/ .28g ROF: 30+ rps The Mini-Fusion Engine, with even better air efficiency! All kits come with an FCU, Switchboard, Wire Harness and any additional components needed to convert the specific airsoft rifle model for which the kit is configured. The HPA Tank, Air Rig (regulator/line/QD fitting) and Battery needed to operate the system are purchased separately. Winner of the "Best HPA Engine" in the 9th Airsoft Players Choice Awards, the dual solenoid design of the F2™ provides the same functionality as the legendary Fusion Engine™ but in a more compact, efficient and flexible design. Dual solenoids allow for the nozzle and the poppet valve to be adjusted independently of each other for unparalleled control over both the loading time and air volume used. Additionally, this makes it possible to change the firi