Version 2.1 of the hop-up alignment system, designed specifically for ICS MPX/CXP HPA replicas using:
- Blackdraft Phoenix engine (compact high-performance HPA engine with an excellent price-to-performance ratio).
- RETROARMS chamber (hop-up chamber optimized for subcarbine platforms with excellent bucking support and precise adjustment).
BlackDraft Phoenix: This version is a pre-2026 beta release that is not compatible with 2026. If you need it, you can request it.
This kit ensures solid alignment between the Phoenix nozzle and the RETROARMS chamber, perfectly adapting to the compact design of the ICS MPX/CXP platform while maintaining compatibility with the original ICS lower receiver. Ideal for HPA conversions in SMG platforms.
This template was created for Phoenix Beta, which was released before 2026, so if you need the 2026 version, just let me know and I'll put it together for you.
Compatibility
| Component | Compatibility |
|---|---|
| HPA Engine | Blackdraft Phoenix |
| Hop-up Chamber | RETROARMS |
| Base Replica | ICS MPX / CXP |
| Gearbox | ICS Split (compatible with original ICS lower) |
What the kit includes
- Rear clip for mounting on the original ICS lower or printable alternatives.
- Base with housing for M3 threaded inserts (optional brass for increased durability).
- Side clip for routing the HPA tube/line.
- Front locking top cap specifically designed for the RETROARMS chamber.
- Rear plate with mounting point for an M5 screw (additional reinforcement).
Required components (not included)
- 4× M3 × 4.2 mm threaded inserts
- 4× M3 × 8 SHCS screws
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