Answer
Jun 21, 2026 - 10:24 AM
This product uses a Drop In HPA Engine. HPA stands for High Pressure Air, which is a system that replaces traditional airsoft gearboxes to provide more consistent performance and easier tuning for serious players.
What type of engine does this product use? Open Box | MechLabs NEXXUS M4/AR Drop In HPA Engine | Factory Refurbished
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Open Jun 21, 2026 - 10:24 AM
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