blackdraft phoenix alpha silent industries alpha

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

• Blackdraft Phoenix engine (compact and affordable HPA engine with an excellent price-to-performance ratio).
• ALPHA chamber by Silent Industries (high-precision CNC hop-up chamber optimized for HPA with TDC adjustment and lip tensioner system).

This kit ensures a solid alignment between the Phoenix nozzle and the ALPHA chamber, optimized for the compact format of ICS MPX/CXP platforms. Fully compatible with the original ICS lower receiver and designed to fit within the limited internal space of SMG platforms.

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Compatibility

Component	Compatibility
HPA Engine	Blackdraft Phoenix
Hop-up Chamber	Silent Industries ALPHA
Base Replica	ICS MPX / CXP HPA
Gearbox	ICS (compatible with original ICS lower)

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What the kit includes

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

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Installation and adjustment

1. Printing and preparation

• Print the parts with 65–80% infill.
• Lightly sand internal surfaces to ensure a perfect fit within the tight MPX/CXP receiver space.
• Apply dry lubricant on contact surfaces if frequent maintenance is expected.

2. Installation in the replica

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

3. Final fixation

• Secure the rear plate using an M5 screw with washer for maximum rigidity.
• Verify that the Phoenix nozzle enters the ALPHA chamber perfectly centered without lateral play.
• Perform dry feeding tests, considering the limited internal space of the MPX/CXP platform.

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Required components (not included)

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

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Lower receiver recommendations

Fully compatible with the original ICS MPX/CXP lower receiver.

If you need printable alternatives for other projects, the following Gearbox V2 Lower “Universal Lower Part” models also work:

• Version 3
• Version 4.2
• Version 4.3 MTW

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

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3D printing parameters

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

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Manuals

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