GATE Pulsar-S + PolarStar HopUp · Alignment Kit V2.1 · M4 AEG HPA

3D Printing Settings

• Approximate Printing Time: ~1 hour 30 minutes
• Recommended Material: PLA+
• Recommended Layer Height: 0.10 mm–0.15 mm
• Recommended Infill: 65–80%
• Supports: Not required unless necessary for your chosen print orientation

Manuals

Installation and adjustment manuals are available in the Manuals section of the website or on the project's Discord server.

Installation and Adjustment

1. Printing and Preparation

   • Print the parts with 65–80% infill.
   • PLA+ is recommended for good rigidity and dimensional stability.
   • Lightly sand the internal and contact surfaces to achieve a clean fit.
   • Apply dry lubricant or wax to sliding surfaces if you want to facilitate maintenance.

2. Assembly

   • Insert the 4× M3 × 4.2 mm inserts into the base.
   • Secure the base using 4× M3 × 8 SHCS screws.
   • Position the GATE Pulsar-S inside the V2 gearbox.
   • Install the PolarStar HopUp chamber with the inner barrel.
   • Fit the upper cap to lock the chamber in the correct position.
   • Route the Pulsar-S HPA line through the side clip.

3. Final Securing

   • Install the rear clip using the replica's rear pin or fixed stock mounting system.
   • Secure the rear plate with an M5 screw and washer to increase the assembly's rigidity.
   • Check that the nozzle enters the chamber centrally, without friction or excessive lateral pressure.
   • Perform dry feeding tests before using BBs.

Lower Receiver Recommendations

For maximum rigidity, a metal ICS lower receiver is recommended.

You can also use a 3D-printable lower receiver compatible with V2 gearboxes:

• Gearbox V2 Lower — Universal Lower Version 3
• Gearbox V2 Lower — Universal Lower Version 4.2
• Gearbox V2 Lower — Universal Lower Version 4.3 MTW

You can find them HERE.