gate pulsar s 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-S motor (compact HPA engine with integrated electronic control and precise pressure adjustment).
• Silent Industries ALPHA M4/16 AEG/HPA chamber (CNC chamber with TRUE-TDC system, lip tension ring, and HPA-optimized design).

This kit ensures perfect centering between the Pulsar-S nozzle and the ALPHA chamber, eliminating BB feeding variations and maximizing the efficiency of the pneumatic system. The specific geometry takes advantage of the CNC design of the ALPHA and the direct airflow of the Gate system.

Compatibility

Component	Compatibility
HPA Engine	Gate Pulsar-S
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 on sliding areas to facilitate maintenance.

2. Installation in the replica

   • Insert the base into the lower and install 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 respecting the alignment groove of the CNC chamber.
   • Route the Pulsar-S HPA line through the side clip, avoiding sharp bends.

3. Final fixation

   • Secure the rear plate using an M5 screw and washer for maximum rigidity.
   • Verify that the Gate Pulsar-S nozzle enters perfectly centered into the ALPHA chamber.
   • Perform dry feeding tests and adjust the hop-up using the ALPHA tension ring.

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 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.