Polar Star Fusion Engine


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Designed to answer the demands of today’s hardcore airsoft player, the 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 platform, the Fusion Engine can do it all without sacrificing dependability or trigger response. Constructed from CNC machined aluminum the system is extremely durable and is even capable of operating under extreme temperatures without decreased performance or reliability.

You can quickly change and adjust key functions of the engine via the on-board FCU (Fire Control Unit) which is no bigger than an AEG’s MOSFET and can easily fit inside of a rifles battery compartment along with a small Li-po battery. Using the FCU’s five position joystick and LCD display you will be able to easily adjust such functions as the systems cyclic rate, fire modes and nozzle timing on the fly.

With the Fusion Engine in your rifle you will also be able to adjust its muzzle velocity via the remote air rig (sold separately). Adjusting the PSI output on your air rig will allow you to fine tune your rifles muzzle velocity so you will always be able to get it exactly where you want it. And then for larger velocity changes we offer a series of air nozzles with varying bore sizes to shift the velocity adjustment range up or down to best meet your requirements.

The best part is that the system is extremely user friendly. Even if you have only the basic understanding of an airsoft rifle, you will find that operating and manipulating this system is very simple and does not require a degree in airsoft engineering to figure out.

Key Features

Designed, manufactured and built in the U.S.A..
Assembled from CNC machined aluminum components.
Multiple jack screws allow for custom fitment to the M249’s receiver.
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.
Interchangeable air nozzles to shift the velocity adjustment range up or down.
Adjustable nozzle dwell and return to battery times to optimize feeding from any magazine.
Easy to use Fire Control Unit (FCU) with LCD 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!
Interfaces with stock AEG barrel/hop-chamber allowing for aftermarket barrel upgrades and the use of traditional AEG magazines.
Capable of functioning in damp and sub-freezing climates without affecting performance or reliability.

Required for operation: Classic Arms M249 AEG (less gearbox and motor), Air Rig, HPA Tank, Battery

NOTE: The M249 Fusion Engine is also compatible with the ECHO 1 and A&K M249 models. However, if used with the guns original hop-up chamber and bucking, you will need to install the M4/M16 series nozzle.

(CO2 and Propane cannot be used to power the Fusion Engine. Using liquid propellants such as this can result in damage to the system.)


FE Profile: CA M249
FE Nozzle Type: CA M249 Series, Blue (FE-NZ-BLU-M249)
Selector Plate: N/A
Cyclic Rate: 500 RPM to 1,800 RPM
Fire Modes: Semi / 2 to 9 Shot Burst, Semi / Full Auto, Semi Only
Power Source: HPA (High Pressure Air via remote air rig)
FCU Battery: 7.4v Lipo w/ JST Connector (BAT-LIPO-74-250)
FCU Voltage Input Range: 6.8v to 12v
Electronics: REV2
PSI Operating Range: 80 psi. to 120 psi.
Build Material: Aluminum
Weight: .75 lbs




Additional information

Weight 2 lbs
Dimensions 4 × 8 × 12 in