The Jefftron Micro Active Brake II is a compact, high-performance MOSFET designed specifically to solve the multiple-shot problem that plagues high-ROF airsoft electric guns. Whether you’re running a DMR build or a heavily tuned skirmish rifle, this active brake system ensures single, clean shots in semi-automatic mode—every time.
Key Features
- Active motor braking – eliminates multiple shots in semi-automatic fire
- Piston fully releases after each shot – reduces wear on internal parts and spring
- Nozzle lock optimisation – hop-up chamber remains sealed for improved accuracy
- Compact design – fits tight gearbox spaces without modification
- Professional-grade MOSFET technology – reliable, consistent performance
- Compatible with high-ROF builds – ideal for tuned and upgraded AEGs
Real-World Use Cases
The Micro Active Brake II is essential for competitive skirmishers running high-rate-of-fire builds who need reliable semi-automatic trigger control. It’s equally valuable for DMR and precision rifle builders who demand single, accurate shots. Milsim players benefit from the reduced mechanical strain, which extends internal component lifespan during long events.
Technical Specifications
- Product Type: MOSFET with active motor braking
- Firing Mode Control: Semi-automatic optimisation with active brake
- Design: Micro form factor, compact gearbox fit
- Technology: Professional-grade active braking circuit
Compatibility & Upgrades
The Jefftron Micro Active Brake II is compatible with standard Version 2 and Version 3 gearboxes found in most AEGs. Installation requires basic electrical knowledge and soldering skills. Pair it with a quality mosfet-compatible trigger unit and quality wiring for optimal results. Check your specific gearbox before purchase to ensure fit.
UK Legal & Site Notes
The Micro Active Brake II is an internal upgrade component and carries no legal restrictions in the UK. Use is permitted on all insured airsoft sites. Always check your local site’s rules regarding upgraded components; most venues welcome reliability improvements that reduce jams and misfires.
Invest in the Jefftron Micro Active Brake II and take control of your semi-automatic precision. Order yours from Airsoftdirect UK today.







