Prometheus Non-linear Spring MS110
Upgrades the FPS of your AEG from approximately 350 FPS to 380 FPS
Polarstar Jack V2 Conversion Kit
he Polarstar JACK V2 M4 Engine - HPA Standard FCU Conversion Kit. This is the full sized FCU version for easy programming. Fits in most M4 and M16 airsoft guns for a full air line HPA engine conversion. Contains everything you need internally. Works d
Polarstar F2 V2 Conversion Kit
F2 is essentially a Mini Fusion Engine. It offers the same adjustability and performance as the Fusion Engine in a cylinder sized package.
Polarstar V2 Fusion Engine
Designed to answer the demands of today's hardcore airsoft player, the patented Fusion Engine is one of the most reliable, high performance airsoft systems available today. No matter if you need a high fire rate CQB setup or a high velocity sniper platfor