Polarstar Fusion Engine V2 Gen3 - HPA Standard FCU Conversion Kit HPA fcu etc) are specifically designed to

etc) are specifically designed to reduce shock to the magazine if dropped thus prolonging the life of the magazine

A bottle of 2700 rounds of competition grade glow in the dark bright Red color

Low Battery Indication and Preservation

Made of hardened stainless steel in a variety of AEG styles

Polarstar Fusion Engine V2 Gen3 - HPA Standard FCU Conversion Kit HPA fcu etc) are specifically designed toPolarstar 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