Version 2.1 of the hop-up alignment system, designed for M4 AEG HPA replicas using:
- PolarStar F2 engine (dual-solenoid HPA engine with precise pneumatic control and high efficiency).
- PROWIN chamber (CNC aluminum hop-up chamber with micrometric adjustment and excellent support for heavy BBs).
This kit ensures perfect centering between the F2 nozzle and the PROWIN chamber, eliminating lateral play that affects feeding consistency in HPA setups. Fully compatible with ICS split systems and standard V2 gearboxes.
Compatibility
| Component | Compatibility |
|---|---|
| HPA Engine | PolarStar F2 M4 |
| Hop-up Chamber | PROWIN |
| Base Replica | M4 AEG |
| Gearbox | V2 / ICS SPLIT |
What the kit includes
- Rear clip for mounting via rear pin or fixed stock.
- Base with housing for M3 inserts (optional brass for increased durability).
- Side clip for routing the F2 HPA tube/line.
- Front locking top cap optimized for the PROWIN chamber.
- Rear plate with mounting point for an M5 screw (additional reinforcement).
Required components (not included)
- 4× M3 × 4.2 mm inserts
- 4× M3 × 8 SHCS screws
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