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Blackdraft Phoenix MAXX model Alignment kit SCAR-L (v2.1)

24,00 €
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Version 2.1 of the hop-up alignment system, designed specifically for SCAR-L HPA replicas using:

  • Blackdraft Phoenix engine (compact high-performance HPA engine with competitive pricing).
  • MAXX MODEL chamber (high-precision hop-up chamber with excellent bucking control for HPA systems).

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 guarantees perfect alignment between the Phoenix nozzle and the MAXX MODEL chamber on the SCAR-L platform, maintaining full compatibility with the ICS lower receiver and eliminating inconsistent feeding issues commonly found in HPA SCAR builds.

Compatibility

Component Compatibility
HPA Engine Blackdraft Phoenix SCAR-L
Hop-up Chamber MAXX MODEL SCAR-L
Base Replica SCAR-L HPA
Gearbox V2 / ICS SPLIT

What the kit includes

  • Rear clip for mounting using the rear body pin or fixed stock.
  • Base with housing for M3 threaded inserts (optional brass inserts).
  • Side clip specifically designed for routing the HPA tube/line in SCAR-L builds.
  • Front locking top cap optimized for the MAXX MODEL 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 clean fit within SCAR-L dimensions.
  • Apply dry lubricant or wax on contact surfaces to simplify maintenance.

2. Installation in the replica

  • Insert the base into the ICS lower receiver (or compatible lower) and install the M3 threaded inserts.
  • Mount the rear clip aligned with the SCAR-L rear body pin system.
  • Install the MAXX MODEL chamber with the inner barrel; the top cap locks the assembly and maintains precise alignment.
  • Route the Phoenix HPA line through the side clip designed for SCAR geometry.

3. Final fixation

  • Secure the rear plate using an M5 screw with washer for maximum rigidity.
  • Verify that the Phoenix nozzle enters the MAXX MODEL chamber perfectly centered, without lateral play.
  • Perform feeding tests and adjust Phoenix pressure according to your setup.

Required components (not included)

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

Lower receiver recommendations

Compatible with the original ICS metal lower receiver, recommended for maximum rigidity in SCAR-L HPA builds.

If you prefer a printable alternative, the following Gearbox V2 Lower “Universal Lower Part” models are also compatible:

  • Version 3
  • Version 4.2
  • Version 4.3 MTW

Available here:
https://lab.sychev.xyz/categoria/hpa-lower

3D printing parameters

  • Approximate print time: ~1 h 30 min
  • 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.