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PolarStar HPA Fusion Engine V3 Gen 3 AK Series Gearbox

SKU: PS-FEV3-AK PolarStarIn Stock Map ProtectedPrice is map protected. Coupon(s) may not be applied to this item.

  • Stabilizes the BB in the hop up before firing
  • Removes any spin that may cause BBs to veer in a different directions at range
  • Immediate trigger response without dryfire
  • User selectable Semi/Full Auto, Semi Auto Only and Variable Burst modes
  • FCU adjusts key settings to meet field requirements
  • Fusion Engine for Specifically V3 gearbox
  • Improves hop up performance with a wide range of stock and aftermarket options
  • Assembled from CNC machined aluminum components
  • Designed, manufactured and built in the U.S.A.
  • True closed bolt operation provides superior air seal and promotes accuracy
  • Independently adjustable velocity and cyclic rate
  • Auto Switch mode allows for proper selector configuration for specific models
  • Interchangeable air nozzles shift the velocity adjustment range up or down
  • Easy to use Fire Control Unit (FCU) with display and five position joystick
  • Uniform shot-to-shot air volume discharge allows for unmatched velocity consistency
  • Instantaneous trigger response. Faster than an AEG with a Li-Po
  • Capable of functioning in damp and sub-freezing climates without affecting performance or reliability


PolarStar HPA Fusion Engine V3 Gen 3 AK Series Gearbox

The PolarStar Fusion Engine is the perfect HPA compatible engine for optimal customization. This engine offers upgradable parts that other engines don't offer. These nozzles have different boar sizes that effects your air efficiency and can ultimately benefit from this. Featuring a Fire Control Unit (FCU) that is very user friendly, you can adjust your settings from rate of fire (ROF) to trigger pull and make it significantly faster and more responsive than users with AEGs. The Fusion engine comes in different gearbox shells fitting V2 and V3 to LMG gearboxes. Why worry about damaging your AEG's internals because of which battery it can handle? This fusion engine uses a 7.4 LiPo battery and does not inflict harmful damage to your rifle's internals. It can offer so much and perform higher than your standards anticipated.

About PolarStar: PolarStar Airsoft was formed in 2009 as a part of PolarStar Engineering & Machine with the goal of bringing our engineering experience and focus on quality to airsoft. Since then, PolarStar has made innovative airsoft products of the highest quality, designed and manufactured in the USA. PolarStar products, including the patented Fusion Engine are designed by airsoft players, incorporating airsoft experience with the feedback of the commnity.

In the Box

1X Fusion Engine


1X Set of Wireharness'

1X Trigger board

1X Manual


Brand Polarstar
Nozzle Type AK
Compatibility Version 3 AK Series
Propellant HPA
Material Aluminum Alloy

California Proposition 65 Warning: Cancer and Reproductive Harm -

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