Polarstar F1 HPA Conversion For M4-M16 w- REV3 FCU H&K 1 cm [15"] Inner Barrel

1 cm [15"] Inner Barrel Length: 370 mm Inner Barrel Diameter: 6

Amazingly Accurate

95mm +/- 0

Description: CTW/PTW Cylinder Head Assembly

Description: NcStar Tactical Back Pack(ACU)

Polarstar F1 HPA Conversion For M4-M16 w- REV3 FCU H&K 1 cm [15"] Inner BarrelWhat is the F1? Like the Fusion Engine and JACK, the patent pending F1 is a high performance HPA (High Pressure Air) system which replaces the traditional piston and gears of an AEG with a programmable pneumatic system. Flow Control The unique flow control system uses an integral check valve to regulate the forward speed of the nozzle while maintaining the fastest retract speed possible. This system is also what makes the F1's "2 stage" firing