The Advanced M4 Arm & M-nub from Airtech Studios offers a practical hop-up enhancement for a wide range of M4 AEGs using 3-gear hop-up units. Designed for broad compatibility across popular brands, this upgrade aims to deliver improved hop consistency and stable BB flight.
- Suitable for all brand M4 AEGs with a 3-gear hop-up unit
- Includes advanced arm and precision M-nub components
- Intended to maximise hop-up pressure and contact patch
This Airtech Studios kit is an ideal solution for Airsoft players seeking a straightforward way to refine their M4’s shot-to-shot reliability.

































