PolarStar F2 Nozzle – CA/A&K M249 – CA #3
The PolarStar F2 Nozzle for CA/A&K M249 (CA #3) is the platform-specific nozzle for PolarStar F2 HPA engine installations in Classic Army and A&K M249 LMG body platforms. The M249 SAW is an LMG platform with a different hop-up and nozzle path specification to standard M4/AK AEGs — the correct M249-specific nozzle (CA #3 in the PolarStar F2 range) is essential for reliable BB feed and consistent shot cycling in an F2 M249 HPA build.
PolarStar F2 is a popular HPA engine choice for support weapon builds where the LMG platform configuration is retained but powered by regulated HPA rather than spring. For CA or A&K M249 operators building an F2 HPA conversion, CA #3 is the confirmed correct nozzle for these platforms.
- PolarStar F2 Nozzle — CA/A&K M249, CA #3
- Platform-specific nozzle for F2 HPA engine in M249 LMG bodies
- Compatible with Classic Army and A&K M249 platforms
- Made by PolarStar Airsoft — leading HPA engine manufacturer



