F2™ HPA Conversion Kit MODEL:HK417/G28 (VFC) - #1 Nozzle The included Delrin spacer extends

The included Delrin spacer extends the front of the engine so that it will be the correct length to match up to the hop-up chamber while the included Nut provides an anchoring point for the stock bolt

EF ARX160 ELITE

ICS MP5 A/SD

This system won "Best HPA Engine" the very first year Popular Airsoft added the HPA class to their Players' Choice Awards

CQB (275mm) = 446fps

F2™ HPA Conversion Kit MODEL:HK417/G28 (VFC) - #1 Nozzle The included Delrin spacer extendsBite Sized Fusion Engine 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