ATC x MAC CRBN Gearbox: Elevate Your Airsoft Build with Unmatched Flexibility

Collaborating with MAC—pioneers in precision engineering—we’re thrilled to introduce our groundbreaking ATC x MAC CRBN Gearbox. Designed exclusively for CRBN Uppers, this innovative upgrade empowers you to pair your build with any V2 airsoft engine system, breaking free from restrictive compatibility limits once and for all.

Why Upgrade Your Build?

Tired of being confined by limited engine options? With this universal CRBN gearbox, you can seamlessly integrate PolarStar drop-in engines (F2/F1/Jack), Wolverine, Redline, or any other V2 system into your setup. Whether you’re chasing performance or customization flexibility, this gearbox unlocks endless possibilities for your airsoft builds.

Key Features That Set It Apart

• Precision-Milled Construction: Built from high-quality materials for durability and precision alignment
• Centering Grub Screws: Simplify HPA engine installation with precise alignment control
• Matte Black Finish: Sleek aesthetic that blends seamlessly into your custom build
• Included Hardware: Comprehensive set of screws for both gearbox halves
• V2 Engine Compatibility: Works flawlessly with PolarStar F-series engines and more

Compatibility Made Simple

This gearbox is engineered to work flawlessly with:
– G&G-style V2 lowers (SSG1/ARP9/SSG556 series)
– Other V2 lower/uppers (including grip systems)

What’s Inside?

Your package includes everything you need to get started—except a selector plate or trigger board screw (available separately).

Upgrade your airsoft experience today with a gearbox that prioritizes versatility without compromising on quality. Whether you’re building from scratch or enhancing an existing setup, the ATC x MAC CRBN Gearbox is your ultimate tool for creativity on the field.