gate pulsar h silent industries alpha alignment kit v2

Version 2.1 of the hop-up alignment system, specifically designed for M4 AEG HPA replicas using:

• Gate Pulsar-H motor (high-power compact HPA engine with integrated electronic control system).
• Silent Industries ALPHA M4/16 AEG/HPA chamber (precision CNC chamber with TRUE-TDC system and lip tension ring optimized for HPA).

This kit ensures perfect alignment between the Pulsar-H nozzle and the ALPHA chamber, eliminating double feeding issues and maximizing the efficiency of the pneumatic system. The configuration takes advantage of the direct response of the Pulsar-H and the precise geometry of the ALPHA for exceptional shot-to-shot consistency.

Compatibility

Component	Compatibility
HPA Engine	Gate Pulsar-H
Hop-up Chamber	Silent Industries ALPHA M4/16 AEG/HPA
Base Replica	M4 AEG
Gearbox	V2 / ICS SPLIT

What the kit includes

• Rear clip for mounting via rear pin or fixed stock.
• Base with housing for M3 inserts (optional brass).
• Side clip for guiding the HPA tube/line.
• Front locking top cap optimized for the CNC geometry of the ALPHA 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 the internal areas and contact surfaces for a clean fit.
   • Apply dry lubricant or wax to sliding areas if you want to make maintenance easier.

2. Installation in the replica

   • Insert the base into the lower and secure the M3 inserts.
   • Place the rear clip aligned with the rear pin or the stock anchor point.
   • Install the ALPHA chamber with the inner barrel; the top cap locks the assembly while keeping the barrel perfectly centered.
   • Route the Pulsar-H HPA line through the side clip to avoid bends.

3. Final fixation

   • Secure the rear plate using an M5 screw and washer for maximum rigidity.
   • Verify that the Gate Pulsar-H nozzle enters centered into the ALPHA chamber without lateral play.
   • Perform dry feeding tests and adjust the ALPHA hop-up according to your BBs.

Required components (not included)

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

Lower receiver recommendations

It is recommended to use the ICS metal lower receiver for maximum rigidity.
If you prefer to print the lower part, the following Gearbox V2 Lower “Universal Lower Part” models are fully compatible:

• Version 3
• Version 4.2
• Version 4.3 MTW

You can find them HERE.

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.