gate pulsar s 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-S engine (compact HPA engine with integrated electronics and precise trigger control).
• BEGADI Neptune PRO chamber (high-precision CNC hop-up chamber with lateral adjustment system optimized for HPA).

This kit guarantees perfect alignment between the Pulsar-S nozzle and the Neptune PRO chamber in the SCAR-L platform, eliminating common HPA misalignment issues and improving feeding consistency. Fully compatible with ICS lowers and adapted V2 gearboxes.

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Compatibility

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

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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 for increased durability).
• Side clip for routing the Pulsar-S HPA line.
• Front locking top cap optimized for the Neptune PRO chamber.
• Rear plate with mounting point for an M5 screw (additional structural 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 to ensure a smooth and precise fit.
• Apply dry lubricant or wax on sliding surfaces to simplify 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-L rear body pin.
• Install the Neptune PRO chamber with the inner barrel; the top cap locks the assembly while keeping everything perfectly centered.
• Route the GATE Pulsar-S HPA line through the side clip, preventing friction with the SCAR chassis.

3. Final fixation

• Secure the rear plate with an M5 screw and washer for maximum rigidity.
• Verify that the Pulsar-S nozzle enters the Neptune PRO chamber perfectly centered, without lateral play.
• Configure the Pulsar-S firing modes and perform dry 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

Compatible with the original ICS metal lower receiver, 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.