Polarstar Fusion Engine V2 Gen3 - HPA Standard FCU Conversion Kit EMG The battery should be used

The battery should be used when there isn't enough sun light

the precision Hopup Lever and 4mm Bucking Nubs (6mm Bucking Nubs are optional) to perform best with R-Hop and Standard-Hop to keep the BB shooting accurately and consistently on every single shot

Will fit nearly all airsoft guns - 14mm CCW threaded only

Glock 17 Co2 Gas Spare Magazine (VFC Full Blowback)

Polarstar Fusion Engine V2 Gen3 - HPA Standard FCU Conversion Kit EMG The battery should be usedPolarstar Fusion Engine V2 Gen3 HPA Standard FCU Conversion Kit. This is the full sized FCU version for easy programming. Contains everything you need internally. Works drop in with most M4 platforms. G&G, Elite Force, JG, and most are pretty easy to install. Watch some Youtube videos on how to put it in yourself. With the Polarstar Fusion Engine V2 Gen3 HPA Standard FCU Conversion Kit, all you need to complete your HPA setup is: HPA Air Tank (non SLP