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Sparklabs WOLF + Begadi Neptune Pro · Alignment Kit V2.1 · SR25 AEG HPA

23,00 €
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Version 2.1 of the hop-up alignment system, designed for the SR25 AEG HPA platform with 2.5 gearbox. This kit is designed to work with the Sparklabs WOLF engine and Begadi Neptune Pro hop-up chamber, providing clean nozzle-to-hop-up alignment to improve feeding consistency and shot stability.

Compatibility

Component Compatibility
HPA Engine Sparklabs WOLF
Hop-up Chamber Begadi Neptune Pro
Base Replica SR25 AEG
Gearbox 2.5 / ICS Split

What’s Included

  • Rear clip for mounting using the rear pin or fixed stock.
  • Base with housing for optional M3 brass inserts.
  • Side clip for guiding the HPA line or tubing.
  • Top cap for securing the front of the hop-up chamber.
  • Rear plate with mounting point for an M5 screw.

Installation and Adjustment

  1. Printing and Preparation

    • Print with 65%–80% infill.
    • Lightly sand the internal areas for a clean fit.
    • Apply dry lubricant or wax if smoother operation is desired.

  2. Installation on the Replica

    • Insert the base into the lower receiver and install the M3 inserts.
    • Position the rear clip aligned with the rear pin or stock mounting point.
    • Install the Begadi Neptune Pro chamber with the inner barrel and close the assembly with the top cap.
    • Route the Sparklabs WOLF HPA line through the side clip to prevent rubbing and excessive bending.

  3. Final Securing

    • Secure the rear plate using an M5 screw and washer.
    • Check that the nozzle enters the chamber centrally, without lateral play.
    • Perform dry tests and adjust the hop-up according to the BB weight being used.

Required Components (Not Included)

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

Lower Receiver Recommendations

For maximum rigidity, using an ICS metal lower receiver is recommended.

If you prefer to print the lower section, the following Gearbox v2 Lower "Universal Lower" models are compatible:

  • Version 3
  • Version 4.2
  • Version 4.3 MTW or 4.4 MTW

You can find them HERE.

3D Printing Parameters

  • Approximate printing 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.