Free Shipping on Orders Over $149 with Coupon Code: FREESHIP for lower 48 states in the U.S.*.  No in-store services, please stay in the car for curbside pickup. Call 562-287-8918, we will bring the items out for you.

PolarStar Kythera HPA Engine for Version 2 M4 Airsoft Rifles

SKU: PS-KYTHERA PolarStarOut of stock Map ProtectedPrice is map protected. Coupon(s) may not be applied to this item.

  • Designed from the ground up as a high performance mechanical HPA system, not a modification of a solenoid operated design
  • Patent pending valve mechanism provides excellent efficiency and consistent velocity combined with a realistic trigger pull and reset
  • Completes a full shot cycle on the trigger alone which translates into consistent nozzle movement and rapid follow up shots
  • Adjustable trigger (weight, length of pull and over travel)
  • Adjustable nozzle dwell/return speed
  • Easy to install system that fits into a standard Version 2 gearbox as a single assembly and typically doesn't require any modification to the gearbox
  • The Kythera has a wide operating pressure range of 60 psi to 180 psi which allows you to fine tune the velocity of the system and tailor for different requirements and applications


In the Box

1x Kythera Engine


Brand Polar Star
Firing Modes Semi-Automatic
Velocity Ranges 270 FPS - 500 FPS (Measured using 0.20g BBs)
Operating Pressure 60psi - 180psi
Compatibility Most Version 2 Gearbox

California Proposition 65 Warning: Cancer and Reproductive Harm -

Connect with us.