PolarStar Kythera V2.5 (SR25) HPA Engine

The PolarStar Kythera V2.5 is a fully mechanical, electronics-free HPA system designed for airsoft players who demand reliability and a realistic feel—without worrying about batteries or fragile components. Built for SR25 platforms and AEG gearboxes, it delivers consistent power, fast follow-up shots, and a waterproof design you can trust in any field condition.

• Fully mechanical design: No battery, FCU, or electronics to charge or fail. The Kythera operates purely on mechanical principles, offering rugged reliability and true waterproof capability.
• Realistic, adjustable trigger: The trigger mirrors the feel and weight of a real single‑action firearm, with adjustable weight and over-travel to dial in your preferred break and reset.
• Complete shot cycle: Each pull completes a full shot cycle with automatic recharging, enabling rapid follow-up shots and reducing the chance of double feeding.
• Efficient air usage: The valve design uses air directly through the nozzle without a pilot valve, delivering consistent performance and high efficiency.
• Semi-Automatic Kythera SA for AEG gearboxes: Semi-auto functionality tailored for AEG platforms, with the added benefit of a robust, all-mechanical system. Includes the PolarStar Filter Fitting for easy setup.
• Waterproof and low maintenance: Fewer moving parts and a purely mechanical setup mean fewer electronics to protect and simpler maintenance in harsh conditions.

The Kythera SA variant is engineered for fast, reliable semi-automatic fire with a realistic trigger that adapts to your shooting style. Its design keeps the nozzle charged and ready, so follow-up shots come quickly and smoothly. Because there are no electronic components in the signal path, you won’t face battery failures, processor issues, or moisture-sensitive electronics during play or storage. This makes Kythera ideal for intense field play, wet environments, or scenarios where dependable performance is paramount.