The Bingo Airsoft Designs MAC-10 Polarstar JACK Gearbox Replacement Kit is now available! The MAC-10 gearbox replacement kit will allow you to convert your TM MAC-10 AEP (or the JG MAC-10 AEP) into an HPA powered airsoft gun using the Polarstar JACK HPA engine. The gearbox replacement kit makes it very easy to convert your airsoft gun with minimal modifications to your MAC-10. Simply remove the existing gearbox system, and install the gearbox replacement kit (see the installation video below), and you'll be ready to enjoy the performance, maintainability, and consistency of a JACK-powered HPA airsoft gun!

The gearbox replacement kit is designed to work with the TM MAC-10 AEP and the JG MAC-10 AEP (it may work with the DE MAC-10 AEP, but this has not been verified yet). The kit will NOT work with any of the GBB MAC-10 airsoft guns.

The kit will install into your MAC-10 with very few modifications. The only permanent modification is a hole must be drilled for the air line to exit. Since the MAC-10 is not significantly modified, you can easily reinstall your AEP gearbox if you choose. A video is available (see below) which will provide details on how to install the gearbox replacement kit. All functionality of your MAC-10 will be retained - safe, semi and full auto, and the ejection port/hopup dust cover will continue to operate.

The MAC-10 Gearbox Replacement Kit will include the following:

  • Special Polarstar JACK engine designed for the MAC-10**, with JACK FCU
  • Custom 3D printed MAC-10 chassis for the JACK engine
  • Custom 3D printed upper plate
  • Custom 3D printed lower plate with full auto microswitch and mini connection circuit board
  • Custom trigger wire harness
  • Custom length JACK FCU wire harness
  • Air line with Foster series QD plug
  • Extra small 180 mAh 7.4v lipo battery
The gearbox replacement kit does NOT include the MAC-10 AEP airsoft gun (pictured above) or the required air rig and tank to operate the JACK engine.

The MAC-10 JACK kit will shoot approximately 250 fps w/.20g BBs at 80 psi, and 310 fps w/.20g BBs at 120 psi, using the stock TM MAC-10 inner barrel.

** the MAC-10 JACK engine is custom made for the MAC-10/MP7. It is not compatible with standard AEG gearbox shells. The MAC-10 JACK engine cannot be converted so it can installed into a standard V2 gearbox shell.

Here's the installation video for the MP7 JACK gearbox replacement kit:

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MAC-10 Polarstar JACK Gearbox Replacement Kit

  • $495.00
  • $405.00


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