PolarStar F2 Nozzle – MASADA / A&K – A&K #13
The PolarStar F2 Nozzle for MASADA / A&K (A&K #13) is the platform-specific nozzle for PolarStar F2 HPA engine installations in MASADA and A&K body platforms. The MASADA is an AR-derived platform with proprietary internal geometry that differs from standard M4/M16 AEGs — the correct MASADA-specific nozzle (A&K #13 in the PolarStar F2 range) is required for reliable BB feed and consistent cycling in an F2 MASADA build.
PolarStar is one of the leading HPA engine manufacturers in airsoft. For MASADA or A&K operators building an F2 HPA conversion, A&K #13 is the correct nozzle specification for these platforms.
- PolarStar F2 Nozzle — MASADA / A&K, A&K #13
- Platform-specific nozzle for F2 HPA engine in MASADA/A&K bodies
- Correct nozzle for MASADA-format hop-up geometry
- Made by PolarStar Airsoft — leading HPA engine manufacturer



