Version 2.1 of the hop-up alignment system, designed for M4 AEG HPA replicas with a V2 gearbox.
This kit combines the Blackdraft Phoenix 2026 engine with the Begadi PRO NEPTUN hop-up chamber, ensuring stable alignment between the nozzle and the hop-up chamber. The result is more consistent feeding, a more rigid assembly, and more reliable adjustment for high-performance HPA builds.
The Begadi PRO NEPTUN chamber allows adjustment of the feeding position and supports different nozzle lengths, while the alignment kit keeps the assembly centered within the V2 gearbox. This helps reduce play between the engine, hop-up chamber, and inner barrel.
Compatibility
| Component | Compatibility |
|---|---|
| HPA Engine | Blackdraft Phoenix 2026 |
| Hop-up Chamber | Begadi PRO NEPTUN |
| Base Replica | M4 AEG |
| Gearbox | V2 |
| Platform | M4 / AR15 AEG HPA |
What's Included
- Rear clip for mounting using the rear pin or fixed stock attachment.
- Base with mounting points for M3 inserts.
- Side clip for routing and organizing the HPA line.
- Upper front locking cap for the Begadi PRO NEPTUN chamber.
- Rear plate with a mounting point for an M5 screw.
- Support pieces to keep the hop-up chamber and nozzle properly aligned.
Required Components (Not Included)
- 4× M3 × 4.2 mm inserts
- 4× M3 × 8 SHCS screws
- 1× M5 screw
- 1× M5 washer
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