gate pulsar s maxx model alignment kit v2 1 scar l hpa

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 electronic control and versatile high-performance configuration).
• MAXX MODEL chamber (CNC hop-up chamber optimized for HPA with excellent bucking support and precision adjustment).

This kit ensures perfect centering of the Pulsar-S nozzle with the MAXX MODEL chamber in SCAR gearboxes, eliminating lateral variations and improving feeding consistency in high-pressure HPA configurations. Fully compatible with ICS lowers and SCAR-L platforms.

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Compatibility

Component	Compatibility
HPA Engine	GATE Pulsar-S
Hop-up Chamber	MAXX MODEL
Base Replica	SCAR-L
Gearbox	SCAR / ICS SPLIT

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What the kit includes

• Rear clip adapted for SCAR-L mounting (rear body pin or fixed stock).
• Base with housing for M3 threaded inserts (optional brass for durability).
• Side clip specifically designed for routing the HPA tube in SCAR builds.
• Front locking top cap optimized for the MAXX MODEL chamber.
• Rear plate with mounting point for an M5 screw (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 for a precise fit.
• Apply dry lubricant or wax on moving areas to facilitate 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 system.
• Install the MAXX MODEL chamber with the inner barrel; the top cap locks the assembly while keeping everything perfectly centered.
• Route the Pulsar-S HPA line through the side clip designed for SCAR geometry.

3. Final fixation

• Secure the rear plate using an M5 screw with washer for maximum rigidity.
• Verify that the Pulsar-S nozzle enters the MAXX MODEL chamber centered, without lateral play.
• Perform dry feeding tests and adjust the HPA pressure according to BB weight (90–120 PSI recommended).

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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 for SCAR-L.

If you need printable alternatives, these Gearbox V2 Lower “Universal Lower Part” models also work:

• 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.