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Polarstar Fusion Engine V2 Gen 3 Drop-In Kit


Out of stock


This is a complete HPA drop-in that replaces an AEG gearbox. It is the most adjustable system we produce with the widest range of adjustment in both velocity and rate of fire. The Fusion Engine has a fully adjustable FCU which allows you to adjust the poppet valve (firing air) and nozzle (feeding) independently for full control over both the loading time and air volume used.

  • User selectable Semi/Full Auto, Semi Auto Only and Variable Burst modes.
  • Open Bolt and Closed Bolt firing modes.
  • Independently adjustable velocity and cyclic rate.
  • Instant trigger response. Faster than an AEG with a Li-po battery


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