PolarStar Kythera Mechanical HPA System – Battery-Free Airsoft Excellence

Experience next-level airsoft performance with the PolarStar Kythera, the first fully mechanical HPA system designed for unmatched reliability and realism. Unlike electronic HPA setups, the Kythera operates without batteries, FCUs, or fragile circuitry—making it waterproof, low-maintenance, and ready for any environment.

Key Features & Benefits

True Mechanical Innovation

Engineered from scratch as a mechanical HPA system (not a modified solenoid design), the Kythera delivers consistent velocity, exceptional efficiency, and a realistic single-action trigger with adjustable weight, pull length, and overtravel.

Unparalleled Realism & Performance

• Authentic Trigger Feel: Hardened steel sears engage like a real firearm, offering a crisp break and reset.
• Closed-Bolt Operation: Completes a full shot cycle on trigger pull alone for rapid follow-up shots and reduced misfeeds.
• Adjustable Nozzle Control: Fine-tune dwell time and return speed for optimal cycling.

Ultra-Efficient Air Delivery

The patent-pending valve design eliminates pilot air waste, directing 100% of air pressure through the nozzle for maximum efficiency and shot-to-shot consistency—even at varying pressures (60–180 PSI).

Versatile & Easy to Use

• Wide Velocity Range: Achieve 270–500 FPS (with .20g BBs) by adjusting input pressure—ideal for CQB to sniper roles.
• Quick Installation: Drops into standard gearboxes without modification; retains original trigger and safety parts.
• Manual Cocking Option: Includes a universal steel charging cord for rare pressure-drop scenarios.

Inspired by the ancient Antikythera Mechanism, this revolutionary system proves that mechanical precision still leads the way. Whether you prioritize realism, durability, or raw performance, the Kythera redefines HPA airsoft—no electronics required.

Specs: Semi-auto only | 60–180 PSI operating range | Compatible with standard AEG barrels/hop-ups.