Answer
Oct 30, 2025 - 10:04 AM
Yes, the PolarStar Jack engine is universally compatible with a wide range of gearbox versions that have center-line nozzles. This means it can be used in many different airsoft replicas, making it a versatile upgrade choice. The M249 version cannot be dropped into different gearboxes, but nozzles, wire harness, and trigger boards can be interchanged with different components to fit into different gearboxes.
