IThe X-Mod represents the next evolution of mechanical HPA technology — a platform shaped by real feedback from the global airsoft community. Every element of its design reflects the needs of players and technicians alike, delivering a system that combines modularity with precision to achieve unmatched expandability and adaptability. Whether for performance tuning, platform conversion, or field maintenance, the XX-Mod is engineered to evolve with you.
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Built from CNC-milled aluminum Series 6, the X-Mod achieves the perfect balance between lightweight construction and structural strength. As a drop-in kit, it allows you to replace your standard AEG gearbox with zero hassle, transforming your airsoft gun into a fully mechanical HPA system in minutes. Its modular block design allows for easy and intuitive swapping between sections, adapting the engine seamlessly to different setups or playstyles. Each block connects through a precision lock-fit interface, ensuring perfect mechanical alignment and repeatable assembly.
3-Axis XYZ Alignment System
— Adapts to all receiver types for perfect internal fit.
Fully Mechanical, Zero Electronics
— 100% waterproof; operational even underwater.
Magnetic Return Trigger
— Adjustable travel and sensitivity for crisp, responsive control.
X-Mold Bolt System
— Adjustable nozzle for optimized chamber fit and air-cycle synchronization.
Air Bender Control
— Adjustable bolt-cycle rate and ROF tuning for custom performance.
Mechlabs brings you the Nexxus series engine for the M4/AR15 platform. The Nexxus is a full mechanical engine capable of firing in Semi-Automatic and Full automatic with flip of the selector. No need for batteries just hook up your HPA tank and you are ready to rock. It also boasts an Ultra Fast trigger pull and is very efficient on air up to 3000+ shots with a full 48/4500 tank. The Nexxus engine comes ready to attach to your external HPA regulator set up but if you'd like to run a shoulder stock tank we have a kit that has a regulator built in. Jump on board the HPA revolution with Mechlabs!
PRO-BOLT
The X-Mold Bolt is engineered specifically for the X-Mod HPA engine, yet remains fully cross-tech compatible with the NEXXUS and ARC platforms — allowing existing users to benefit from the same advancements in air performance and efficiency.
Air Performance Enhancements:
Reduced Air Consumption — Improved efficiency provides more shots per tank while maintaining consistent output.
Optimized Burst Management — Lower air-volume demand during rapid fire makes the X-Mod more stable and compatible with lower-flow third-party regulators and tank presets.
Adjustable Nozzle System — The nozzle can be precisely adjusted to fit perfectly within the hop-up chamber, improving grouping and output stability. At the same time, it synchronizes the internal air-cycle rate to deliver the optimal air volume for different nozzle lengths and configurations.
Minimized Shot-Down Effect — Delivers smoother transitions between semi and full-auto fire, reducing FPS drop and maintaining accuracy across bursts.
