The EPES HPA Adapter MK2 represents the evolution of a proven design. Whether you’re upgrading an existing build or equipping a new HPA platform, this compact M6-threaded adapter delivers the reliability and ease of use that experienced skirmishers demand.
Key Features
- Foster US QD coupling – industry-standard quick-disconnect for rapid line connection and disconnection
- Stainless steel construction – corrosion-resistant and built for long-term field use
- Blackened finish – reduced glint and professional appearance
- Refined MK2 design – minor structural improvements over the original generation
- M6 thread compatibility – fits most modern HPA-ready gearboxes and cylinders
Real-World Use Cases
HPA systems offer consistency, reliability, and environmental adaptability that AEG batteries cannot match. The EPES MK2 is ideal for:
- Milsim and long-day events – one air tank powers your gun for hours without power loss
- Winter skirmishes – HPA maintains performance in cold weather when AEGs suffer
- Precision builds – regulated air pressure delivers shot-to-shot consistency for target shooting
- Rapid reconfiguration – Foster QD coupling lets you swap between HPA and AEG platforms quickly
Technical Specifications
- Thread type: M6
- Coupling style: Foster US quick-disconnect
- Material: stainless steel, blackened
- SKU: E101-m6
Compatibility & Upgrades
The M6 thread standard is widely supported across modern HPA-ready airsoft platforms. Confirm your gearbox or cylinder features M6 threading before purchase. The Foster US QD is compatible with standard HPA line connectors and regulators from major brands including Polarstar, Wolverine, and Redline.
UK Legal & Site Notes
HPA adapters themselves are not regulated components. However, your complete airsoft gun must comply with UK legal power limits (two-joule limit on semi-automatic fire under the VCRA). Most HPA setups achieve this easily with proper regulator tuning. Always confirm your site’s chrono limits before play.
Ready to upgrade to HPA performance? The EPES MK2 is a compact, cost-effective foundation for any HPA build. Order now and experience the consistency that serious skirmishers trust.










