Version 2.1 of the hop-up alignment system for M4 / AR15 AEG replicas with a V2 gearbox.
This model is designed to combine the PolarStar F1 engine with a PolarStar HopUp chamber in a standard configuration, without direct attachment. The upper cap keeps the chamber in position and helps maintain alignment between the nozzle and the chamber entrance during installation and operation.
The PolarStar F1 uses a dual-solenoid HPA system that allows independent adjustment of nozzle movement and air release. The PolarStar HopUp chamber for M4/V2 platforms uses a TDC adjustment system and is designed for both AEG and HPA configurations. [55][127]
Compatibility
| Component | Compatibility |
|---|---|
| HPA engine | PolarStar F1 V1 |
| Hop-up chamber | PolarStar HopUp |
| Base replica | M4 / AR15 AEG |
| Gearbox | Standard V2 |
| Mounting system | Without direct attachment |
What's Included
- Rear clip for mounting via the rear pin or fixed stock.
- Main base with M3 insert mounting points.
- Side clip to guide the PolarStar F1 HPA line.
- Upper cap for front locking and positioning of the PolarStar HopUp chamber.
- Rear plate with an M5 screw mounting point.
- Adjustment components to keep the assembly stable inside the V2 gearbox.
Required Components (Not Included)
- 4× M3 × 4.2 mm inserts
- 4× M3 × 8 SHCS screws
- 1× M5 screw with washer
- Complete HPA system: air tank, regulator, HPA line, and battery compatible with the F1 FCU.
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