gate pulsar h begadi neptune pro alignment kit v2 1

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

• GATE Pulsar-H engine (compact HPA engine with integrated electronic control and a horizontal design optimized for SCAR platforms).
• BEGADI Neptune PRO chamber (premium HPA hop-up chamber with adjustable lip tension system and geometry optimized for SCAR-L platforms).

This kit guarantees perfect alignment between the Pulsar-H nozzle and the Neptune PRO chamber, eliminating lateral play and ensuring consistent feeding in high-performance SCAR-L configurations. Fully compatible with ICS lowers and adapted V2 gearboxes.

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Compatibility

Component	Compatibility
HPA Engine	GATE Pulsar-H
Hop-up Chamber	BEGADI Neptune PRO
Base Replica	SCAR-L
Gearbox	V2 / ICS SPLIT

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What the kit includes

• Rear clip for mounting using the rear body pin or fixed stock (adapted for SCAR geometry).
• Base with housing for M3 threaded inserts (optional brass inserts).
• Side clip for routing the HPA line, optimized for the horizontal orientation of the Pulsar-H.
• Front locking top cap optimized for the Neptune PRO 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 areas and contact surfaces for a precise fit.
• Apply dry lubricant or wax on sliding surfaces to simplify assembly and maintenance.

2. Installation in the SCAR-L replica

• Insert the base into the ICS lower receiver and install the M3 threaded inserts.
• Mount the rear clip aligned with the SCAR rear body pin or stock mounting point.
• Install the Neptune PRO chamber with the inner barrel; the top cap locks the assembly while respecting the wider SCAR-L geometry.
• Route the Pulsar-H HPA line through the side clip designed for its horizontal orientation.

3. Final fixation

• Secure the rear plate using an M5 screw with washer for maximum rigidity on the SCAR platform.
• Verify that the Pulsar-H nozzle enters the Neptune PRO chamber perfectly centered, without lateral play.
• Adjust the Neptune PRO lip tension system and perform feeding tests.

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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

Using the original ICS metal lower receiver is recommended for maximum rigidity in SCAR-L HPA builds.

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

• 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 30 min
• 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.