Version 2.1 of the hop-up alignment system, designed for M4 AEG HPA replicas using:
- PolarStar JACK engine (single-solenoid HPA engine, efficient and simple to configure).
- MAXX Model M4 chamber (CNC hop-up chamber with precise hop adjustment, barrel support, and improved air seal).
This kit ensures solid and precise alignment between the JACK nozzle and the MAXX chamber, reducing feeding variations and maximizing the pressure stability typical of HPA systems.
Compatibility
| Component | Compatibility |
|---|---|
| HPA Engine | PolarStar JACK (V2 / M4) |
| Hop-up Chamber | MAXX Model M4 AEG |
| Base Replica | M4 AEG |
| Gearbox | V2 / ICS SPLIT (ICS compatible) |
What the kit includes
- Rear clip for mounting via rear pin or fixed stock.
- Base with housing for M3 inserts (optional brass depending on preference).
- Side clip for routing the JACK HPA line.
- Front locking top cap adapted to the MAXX chamber geometry.
- Rear plate with mounting point for an M5 screw to increase system rigidity.
Required components (not included)
- 4× M3 × 4.2 mm inserts
- 4× M3 × 8 SHCS screws
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