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· Total of 16 ¾ inches of Rail Space on Scope Housing
2008 Year Model P
Adjustable zippered opening for pistol grip configurations
95mm +/- 0
Amazingly Accurate
Polarstar F1 HPA Conversion For M4-M16 w- REV3 FCU H&K · Total of 16 ¾What 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
