Renewed v2.1 version of the hop-up alignment system for AR15 / M4 AEG HPA platforms with V2 gearbox, designed to combine the Redline Milsim N7 Gen2 engine with the GATE EON chamber. In this revision, the kit is now secured from the sides to improve fixation, centering, and overall stability.
Compatibility
| Component | Compatibility |
|---|---|
| HPA Engine | Redline Milsim N7 Gen2 M4 / V2 |
| Hop-up Chamber | GATE EON CNC Hop-Up M4 / AR15 |
| Base Replica | AR15 / M4 AEG HPA |
| Gearbox | Standard V2 |
| ICS Metal Lower | Compatible |
What the Kit Includes
- Rear fixing clip for the assembly.
- Main base with housing for M3 inserts.
- Renewed support system with side fastening.
- Upper locking cap for front centering.
- Rear reinforcement plate secured with an M5 screw.
Installation and Adjustment
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Printing and Preparation
- Print the parts with a layer height of 0.10 mm or 0.15 mm.
- Use approximately 55% to 90% infill, depending on the desired rigidity.
- Lightly sand the contact surfaces to achieve a firm fit with no play.
-
Assembly
- Install the base into the lower and mount the M3 inserts.
- Install the side fastening system, which in this renewed v2.1 version improves the stability of the kit.
- Mount the GATE EON chamber with the inner barrel and verify centering with the front assembly.
- Install the Redline Milsim N7 Gen2 into the V2 gearbox and check alignment with the hop-up chamber.
-
Final Fixing and Testing
- Secure the rear plate with an M5 screw and washer.
- Check that the nozzle feeds consistently and without friction.
- Adjust the hop-up and perform test shots to verify air seal, feeding, and trajectory.
Required Components Not Included
- 4× M3 × 4.2 mm inserts
- 4× M3 × 8 SHCS screws
Lower Receiver Recommendations
A metal ICS lower receiver is recommended when maximum rigidity and durability are required in HPA configurations.
It can also be used with universal lower versions or compatible adaptations, including configurations with an MTW-style grip when the corresponding variant is available.
3D Printing Parameters
- Recommended material: PLA+
- Layer height: 0.10 mm – 0.15 mm
- Recommended infill: 55% – 90%
- Recommended fitting: light sanding on contact areas
Advantages of This Version
- Improved assembly fixation thanks to the side fastening system.
- Better centering between the engine and hop-up chamber.
- Greater structural stability in demanding builds.
- Assembly designed for AR15 / M4 HPA configurations with high-precision components.
Compatibility Note
The GATE EON chamber is designed for M4 / AR15 AEG platforms and stands out for its TDC system, stable air seal, and anti-rotation clip.
The Redline N7 Milsim Gen2 is an HPA system for V2 / M4 gearboxes, updated from the original N7 and designed to work with standard platforms of this type.
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