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This CRBN Gearbox allows you to use a CRBN Upper with ANY V2 airsoft replica engine system! It's now possible to use Polarstar drop-in engines such as the F2, F1, and Jack in your build, as well as Wolverine and Redline engines!
Expand the capability of your CRBN upper builds with an AirTac Customs CRBN Gearbox!
This AirTac Customs CRBN Gearbox includes:
AirTac Customs CRBN Gearbox:
Compatible with:
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