Version 2.1 of the hop-up alignment system, designed for M4 / AR15 AEG replicas with a V2 gearbox using:
- Protech MK2.5 HPA engine.
- Prowin CNC M4/M16 hop-up chamber.
The kit maintains a stable position between the Protech MK2.5 nozzle and the Prowin chamber. This helps reduce lateral play, improve feeding consistency, and maintain more uniform contact between the nozzle, bucking, and chamber.
The Prowin chamber features a CNC-machined aluminum body and a rotary adjustment system using a ring. This design provides more stable hop-up adjustment than conventional toothed-wheel designs, provided the bucking, inner barrel, and nozzle length are correctly adjusted. [273][279]
Compatibility
| Component | Compatibility |
|---|---|
| HPA Engine | Protech MK2.5 M4 HPA Kit |
| Hop-up Chamber | Prowin CNC M4 / M16 |
| Base Replica | M4 / AR15 AEG |
| Gearbox | V2 |
This kit is designed for V2 gearboxes with a centered nozzle. Before final assembly, check the nozzle length and the seal between the nozzle and the bucking.
What's Included in the Kit
- Rear clip for mounting using the rear pin or a fixed stock.
- Alignment base with M3 insert mounting points.
- Side clip to guide the HPA line.
- Upper front locking cap for the Prowin chamber.
- Rear plate with a mounting point for an M5 screw.
Required Components (Not Included)
- 4× M3 × 4.2 mm inserts
- 4× M3 × 8 SHCS screws
- 1× M5 screw with washer for the rear plate
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