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I have a vfc hk417 set with both genetic fire rates and thinking of hpa conversion and looking for advice 

Posted

U have you use polerstar 417 trigger board . Easy to fit . As the 417 has it own trigger that is attached to gearbox . If u just want single only then can get away with wolervine reaper without Fcu as will wire straight to trigger of the 417 . 

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