blackdraft phoenix begadi neptune pro alignment kit v2

Version 2.1 of the hop-up alignment system, designed specifically for ICS MPX/CXP HPA replicas using:

• Blackdraft Phoenix engine (compact and efficient HPA engine, ideal for subcompact SMG configurations).
• BEGADI Neptune PRO chamber (CNC hop-up chamber with precise adjustment system and excellent bucking support for HPA).

This kit ensures solid alignment between the Phoenix nozzle and the Neptune PRO chamber, optimized for the compact ICS MPX/CXP platform. It is fully compatible with the original ICS lower receiver and other universal lowers from the project.

---

Compatibility

Component	Compatibility
HPA Engine	Blackdraft Phoenix
Hop-up Chamber	BEGADI Neptune PRO
Base Replica	ICS MPX / CXP
Gearbox	ICS split / compatible V2

---

What the kit includes

• Rear clip adapted for the compact MPX/CXP format.
• Base with housing for M3 threaded inserts (optional brass).
• Side clip for routing the HPA tube/line in subcompact configurations.
• Front locking top cap specifically designed for the Neptune PRO chamber.
• Rear plate with mounting point for an M5 screw (additional reinforcement).

---

Installation and adjustment

1. Printing and preparation

• Print the parts with 65–80% infill.
• Lightly sand internal areas to ensure a perfect fit within the compact receiver.
• Apply dry lubricant on contact surfaces if necessary.

2. Installation in the replica

• Insert the base into the original ICS lower receiver (or compatible universal lower).
• Mount the rear clip aligned with the MPX/CXP rear body pin.
• Install the Neptune PRO chamber with the inner barrel; the top cap locks the assembly and keeps everything centered.
• Route the Phoenix HPA line through the side clip adapted for the compact MPX/CXP layout.

3. Final fixation

• Secure the rear plate using an M5 screw with washer for maximum stability.
• Verify that the Phoenix nozzle enters the Neptune PRO chamber cleanly without lateral play.
• Perform feeding tests considering the compact internal space of the MPX/CXP platform.

---

Required components (not included)

• 4× M3 × 4.2 mm threaded inserts
• 4× M3 × 8 SHCS screws

---

Lower receiver recommendations

Compatible with the original ICS MPX/CXP lower receiver.

Also works perfectly with these Gearbox V2 Lower “Universal Lower Part” models:

• Version 3
• Version 4.2
• Version 4.3 MTW

Available here:
https://lab.sychev.xyz/prodcuts?q=universal

---

3D printing parameters

• Approximate print time: ~1 h 15 min (compact format)
• Recommended material: PLA+
• Layer height: 0.10 mm – 0.15 mm

---

Manuals

Installation and adjustment manuals are available in the Manuals section of the website or on the project’s Discord server.