PolarStar Kythera SA Nozzle – #21 – Elite Force/CYMA MP5K / CA SA58
The PolarStar Kythera SA Nozzle #21 is the correct nozzle for PolarStar Kythera SA HPA engine installations in Elite Force / CYMA MP5K format platforms and Classic Army SA58 bodies. These platforms require a nozzle with the specific length and geometry that #21 provides — the MP5K compact submachine gun format and the SA58 each have hop-up and nozzle path dimensions that differ from standard M4-format AEGs.
PolarStar is one of the leading HPA engine manufacturers in airsoft. For Elite Force/CYMA MP5K or CA SA58 operators building a Kythera SA HPA conversion, Nozzle #21 is the confirmed correct nozzle number for these specific platforms.
- PolarStar Kythera SA Nozzle — #21
- Compatible with Elite Force / CYMA MP5K and Classic Army SA58
- Platform-specific nozzle for Kythera SA HPA engine installations
- Made by PolarStar Airsoft — leading HPA engine manufacturer



