EPES HPA Adapter for KWA / KSC – Foster QD

The EPES HPA Adapter for KWA / KSC enables you to run your trusted gas blowback replica on HPA systems, offering superior consistency, temperature independence, and longevity compared to traditional propane or green gas.

Key Features

• M6 thread design – Direct fit for KWA and KSC GBB platforms
• Stainless steel construction – Durable and corrosion-resistant
• Foster Series 2 QD socket – Fast, secure connection to HPA lines
• Two-way connection – Allows pressure release upon disconnect
• Compatible with EPES self-closing valves – Reduces gas loss and improves reliability

Real-World Use Cases

Whether you’re a dedicated skirmisher looking to extend your GBB’s operational life, a milsim player who needs consistency across multiple engagements, or a technician maintaining a rental fleet, HPA conversion offers practical advantages. The adapter integrates seamlessly into existing KWA / KSC systems without major modifications, making it ideal for players wanting to upgrade without a complete platform change.

Technical Specifications

• Adapter Thread: M6
• Connection Type: Foster Series 2 QD socket
• Material: Stainless steel
• Compatibility: KWA and KSC GBB replicas
• Pressure Release: Two-way (pressure vents upon disconnect)

Compatibility & Upgrades

This adapter works with KWA and KSC GBB pistols and rifles featuring standard M6 threaded magazine feed necks. For optimal performance, pair with EPES self-closing valves to minimise gas loss and maintain system integrity across extended play sessions. Ensure your HPA setup includes a compatible regulator and line terminated in a Foster Series 2 QD connector.

UK Legal & Site Notes

HPA systems are fully legal in the UK and widely accepted at skirmish sites and milsim events. Check your local site’s rules regarding HPA setups and chronographing; most venues welcome HPA for its reliability and reduced environmental impact. Always carry a propane backup for outdoor play in case of HPA line failure.

Upgrade your KWA or KSC GBB to HPA reliability today. Order the EPES HPA Adapter and take the first step towards consistent, all-weather performance.