| Article number: | HE-TM-020 |
| Availability: | In stock |
| Delivery time: | Standard DPD shipping |
The Hephaestus Marui AK GBBR Adjustable Piston Valve NPAS & Tool Set is a precision-engineered upgrade designed for Tokyo Marui AK GBBR rifles. Featuring an adjustable NPAS (Negative Pressure Air System), this set allows users to fine-tune the muzzle velocity to suit various field requirements and improve performance consistency. The included tool set ensures easy installation and adjustment.