Chimera Mk.II FET
For V2 Gearbox
For V3 Gearbox
For ACR Gearbox NEW
Spectre Drop-In FET
For V2 Gearbox
For Next-Gen V2 GB
Spectre MK.II FET
For V2 Gearbox NEW
For Next-Gen V2 GB NEW
Spare Parts
Chimera Trigger Boards
Wires and Connectors

Indestructable AEG Gearsets

Powerful Computerized FETs

Innovative Gearbox Upgrades

Spectre FET
For V2 Gearbox

A compact version of the Chimera Mk.II FET and utilizes FOUR powerful next-gen MOSFETs. Includes ALL the features the Chimera and fits completely inside the gearbox, making it ideal for AEGs with no room for an external FET. No soldering required!

Price:  $100 USD
Quantity:  No Stock

Airsoft AEG MOSFET - BTC Spectre for V2
Airsoft AEG MOSFET - BTC Spectre for V2
Airsoft AEG MOSFET - BTC Spectre for V2
Airsoft AEG MOSFET - BTC Spectre for V2

Advanced Technology
  • Can handle power surges up to 9000 watts and even run on car batteries.
  • Fully computerized and driven by a high speed PIC18F14K22 microprocessor.
  • Multiple internal layers of heavy copper traces for greater current capacity.
  • Short circuit detection and voltage spike suppression circuits to protect the controller.
  • Smart thermal management reduces heat buildup during sustained firing on certain settings.

MOSFET Trigger
  • Eliminates damaging electrical arcing of the trigger switch contacts.
  • Lower resistance compared to mechanical switching, increasing motor current.
  • Driven by dual IRF671812PBF, a compact yet powerful next-gen MOSFET.

Dynamic Braking
  • Eliminates the motor spin-down time to prevent the piston from over-traveling.
  • Assists in keeping the piston properly reset to reduce stress on the gearbox.
  • Prevents double firing on semi-fire in extremely high RoF setups.
  • Also driven by dual IRF671812PBF MOSFETs.

Cycle Completion
  • Gearbox always completes the last cycle regardless of when the trigger is released.
  • Assists in keeping the piston properly reset to reduce stress on the gearbox.
  • The motor will always have the smoothest and most consistent startup.
  • Allows the anti-reversal latch to be removed.

Fully Configurable Fire Select
  • Both fire select positions can be individually configured, for a total of 64 possible configurations.
  • Available options for each selector position:
    • Semi fire
    • Auto fire
    • 2 round burst
    • 3 round burst
    • 4 round burst
    • 5 round burst
    • Semi with ramping
    • Burst-auto hybrid
  • "Semi w/ Ramping" fires in semi and switches to full auto if the trigger is rapidly tapped.
  • "Burst-auto hybrid" fires in burst and switches to full auto if the trigger remains held down.
  • Can convert any AEG to semi-only by having both selector positions set to semi fire.

Realistic RoF Control
  • Both fire select positions can be individually configured with a different RoF.
  • Every cycle runs at full speed and pauses between each shot to reduce the RoF.
  • Provides the most realistic feel and sound compared to any other forms of RoF reduction.

Adjustable Precocking
  • Precocking stops the piston in a compressed state so the next shot is near-instantaneous.
  • The precocking is fully adjustable and thus also compatible with short-stroked pistons.
  • Offers improved realism and trigger response for sniper or low RoF builds.

LiPo / LiFePO4 Monitoring
  • Monitors LiPo and LiFePO4 batteries to cutoff power before overdischarge occurs.
  • Simply set the number of cells and the controller will use the proper cutoff voltage.

Programmable Digital Fuse
  • Sensor-based current monitoring negates the need for a physical fuse.
  • Cutoff threshold fully adjustable to help protect low-output batteries from over-current damage.

Gearbox Reliability
  • Eliminates the trigger jam normally caused by the cutoff lever stopping at a certain position.
  • The cutoff lever mechanism is no longer needed, greatly reducing the chances of semi-fire related issues.
  • The anti-reversal latch can also be removed to make gearbox reassembly much easier.

Hopup Sensor Compatible
  • Fully compatible with Airsoft System's hopup sensor unit to prevent firing when the mag is empty.

Electrical Ratings

Minimum Maximum
 Supply Voltage 6.5 16 V

Continuous Peak
 Motor Current 60 500 A

 FET Resistance 0.001 Ω


Length Width Height
 Board Size 1.7 1.1 0.5 inch

Gauge & Type
 FET Wiring 16AWG Ecowire(mPPE)

Included Items
  • Specter FET (V2 Gearbox)
  • Extended Gearbox Screw
  • Deans-Tamiya Adapter
  • Product Manual
Product Manuals

Spectre (V2 GB) Manual
Which GBs are incompatible or require heavy modifications to install the Spectre?

The TM G3 gearbox and ICS split-gearbox are not compatible with the Spectre at the moment. V2 gearboxes with proprietary selector plates may require modifications to properly engage the fire select switches.

Is the Spectre compatible with batteries that use Tamiya mini connectors?

A Deans-to-Tamiya adapter is included to allow use of batteries with Tamiya mini connectors.

What is the purpose of the screws that come with the Spectre?

Since both the cutoff lever and safety lever need to be removed, there remains nothing to prevent the selector plate from sliding off the gearbox. Using the provided screws will prevent this from happening.

Is the Spectre compatible with both front and rear wiring?

The Spectre is only compatible with rear wired setups at the moment.

How durable are the included wires?

The included motor/gearbox wires are Ecowire(mPPE) insulated, which is tougher than typical PVC and silicone wires, as thin as Teflon/PTFE wires, and yet very flexible. This thin yet durable Ecowire insulation allows 16AWG wiring to easily fit in the gearbox without having to resort to stiff Teflon wires.

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