This CRBN Gearbox enables 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 the Gate Pulsar!
Tired of putting gold, red and blue hopups in your black builds? So are we, so we made the ATPRO Blackout Edition, the first Maxx hopup to be offered with complete black anodizing.
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