PolarStar F1-CL Version 2 Conversion Kit for M4/M1

PolarStar F1-CL Version 2 Conversion Kit for M4/M1

The F1 is a high performance, universal HPA drop-in cylinder for virtually any AEG gearbox. The performance range of the F1 allows it to fill any role from CQB to sniper.  The new Polarstar F1 will support rifles with offset nozzles (M14, ECHO1 RPD, P90, ect.). They are also very different internally since the F1 uses a custom solenoid designed by PolarStar and manufactured by MAC Valves. The design allows the solenoid to become an integral part of the system and not simply a switch to control gas flow. This not only makes the F1 more compact but also minimizes the dead volume inside of the system, increasing air efficiency and decreasing response time. The F1 also incorporates a dual purpose flow control system which allows for nozzle speed regulation and two stage firing through an integral check valve. The check valve system regulates nozzle speed based on the direction of movement while also controlling flow to the secondary firing point. The flow control limits the forward speed of the nozzle based on a specific orifice size, but allows the nozzle to retract without restriction. This is similar to an AEG piston o-ring, depending on the direction of nozzle movement (or nozzle position) the check valve seal is expanded out of, or compressed into a groove, sealing off ports. This unique design promotes both enhanced feeding and smoother chambering. ROF: 30RPS+ The maximum cyclic rate of the F1 is affected by several factors, however, 30 rounds per second is a conservative number. Most configurations will exceed this easily. 

Air Efficiency: 1200 shots from 13/3000 @ 1.5J (80PSI w/ .28g)

Package include :

• Polarstar F1 V2 M4
• FCU
• Trigger board (will be Redline or Polarstar brand)
• FCU REV3

Please note that instaling a HPA drop in system is recommanded for skilled gunsmith only. The product comes as a spare part and does not come with installation manual. By purchasing an HPA system you take entire responsability of the assembly and upcoming results. For products delivered with a trigger board, contactors / switch are not guaranted by the manufacturer in case of break. We advice to take extreme care when installing the selector plate in order to not break the button. Regarding the trigger switch, it is recommended to block mecanicaly the trigger once the the trigger switch is activated to avoid excessive pressure on it.