POLARSTAR JACK Nozzle
POLARSTAR JACK Nozzle
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DETAILS
DETAILS
- description
PolarStar JACK Nozzles
Dial in correct feeding, air seal, and platform compatibility for your PolarStar JACK engine. PolarStar JACK Nozzles are designed to match specific replica platforms by nozzle length, helping ensure reliable BB feeding, correct hop-up alignment, and consistent performance from your HPA build.
Why Nozzle Selection Matters
Different airsoft platforms – and even different manufacturers making the same platform – can require different nozzle lengths. This is because gearbox shell dimensions, hop-up positioning, and internal tolerances can vary between brands. Using the correct nozzle is essential for proper feeding reliability, air seal, and consistent FPS output.
PolarStar Numbered Nozzle System
PolarStar uses a numbered nozzle system for cylinder conversion engines rather than naming nozzles after a specific rifle model. Once you determine the correct nozzle number for your platform, that number is generally universal across PolarStar engines that use the numbered nozzle system, excluding some model-specific Kythera systems.
JACK Nozzle Compatibility Guide
| Nozzle Number | Most Commonly Used With | Tip Length (Inches) | OAL (Inches) |
|---|---|---|---|
| 1 | TM M4/M16, A&K PKM, TM MP5 A/SD, ICS MP5 A/SD, G&G KAC SR-25E2 | 0.8245 | 1.677 |
| 2 | CYMA AK, CYMA MP5 A/SD, G&G UMP | 0.8625 | 1.715 |
| 3 | CA M249/MK46, A&K M249/MK46 | 0.8095 | 1.662 |
| 4 | G&G GR-25 | 1.4505 | 2.303 |
| 5 | A&K SR-25, JG SR-25, ICS SIG 550/551/552 | 0.9635 | 1.816 |
| 6 | KA FAL, TM MP5K, A&K M240 | 0.8945 | 1.747 |
| 7 | PTS MASADA, CA SCAR-L | 1.1345 | 1.987 |
| 8 | VFC SCAR-H | 1.5075 | 2.36 |
| 9 | EF/S&T TAR-21 COMP | 0.8765 | 1.729 |
| 10 | EF ARX160 ELITE | 1.4865 | 2.339 |
| 11 | CA KAC LMG, VFC MP5 A/SD | 0.7475 | 1.6 |
| 12 | LCT AK-47/74/M, LCT VSS/AS VAL | 0.8355 | 1.688 |
| 13 | A&K MASADA/ACR | 1.3465 | 2.199 |
| 14 | KA CZ 805 BREN, CG M249 Featherweight, A&K M60 | 1.3895 | 2.242 |
| 15 | EF/ARES G36KV/CV, JG G36 | 1.0545 | 1.907 |
| 16 | EF/S&T G36C | 1.0415 | 1.894 |
| 17 | CA AUG | 1.0045 | 1.857 |
| 18 | G&G MP5 A/SD | 0.795 | 1.647 |
| 19 | VFC/ECHO1 XCR | 1.227 | 2.079 |
| 20 | CA G36, CYMA SR-25 | 1.026 | 1.8785 |
| 21 | Elite Force/CYMA MP5K, CA SA58 | 0.923 | 1.771 |
| MP7 | PolarStar MP7 applications | Platform specific | Platform specific |
Measurement Guidance
PolarStar notes that if your replica is not listed in their compatibility database, nozzle length can be calculated by measuring the original gearbox and nozzle. For JACK centreline nozzles, the formula is:
TIP = F + B - (A/2) - .0875
The measured tip length should be within +/- 0.010" of an existing production nozzle to be considered compatible. If it falls outside that range, a production nozzle may not currently exist for that platform.
Key Features
- Genuine PolarStar replacement component
- Designed specifically for PolarStar JACK engines
- Platform-specific feeding optimisation
- Supports consistent FPS performance
- Improves air seal and air efficiency
- Essential for correct HPA engine installation
- Numbered system shared across compatible PolarStar engines
What’s Included
- 1 x PolarStar JACK Nozzle (selected variant)
Important Information
Compatibility: Always confirm the correct nozzle before purchase. The platforms listed are the most commonly used applications, but fitment may vary between manufacturers.
Installation: Recommended during engine installation or servicing.
Use: Intended for airsoft use only.
Choosing the correct nozzle is essential for feeding reliability, air efficiency, and consistent performance — an important final step in any PolarStar JACK build.