MechLabs Nexxus SA HPA Engine Gearbox Kit

The MechLabs Nexxus SA HPA Engine Gearbox Kit is the ultimate drop-in upgrade for airsoft players looking to elevate their performance with a full mechanical HPA setup. Built for serious players who want unmatched reliability and precision, this system eliminates the need for batteries by delivering power purely through compressed air. Designed for M4 and AR15-style AEG platforms with Ver.2 gearbox compatibility, the Nexxus SA supports both semi-automatic and full automatic fire modes via a selector switch, giving users complete control in any combat scenario. Its CNC-machined aluminum body keeps it lightweight yet highly durable, ideal for fast-paced skirmishes and rugged field use. With an ultra-fast trigger response, slip-resistant grooves, and an adjustable pull, this engine is tuned for sharp, responsive firing. Engineered for efficiency, the Nexxus SA delivers up to 3000 shots on a standard 48/4500 HPA tank, making it one of the most air-efficient systems on the market. Whether you're in a CQB arena or out in a full-scale MilSim operation, the adjustable fire rate (14-36 RPS) allows you to dial in the perfect performance for your playstyle. It comes pre-configured with an M4 nozzle, and other Ver.2 nozzles are available separately for broader compatibility. Drop-in ready for external regulator setups, the Nexxus SA also has an optional stock tank kit for players seeking an integrated solution. MechLabs has designed this engine to cater to high-performance airsoft builds without the complexity of electronics, offering a pure mechanical HPA solution with real battlefield reliability. If you're ready to join the HPA revolution and want maximum performance, customization, and durability, the MechLabs Nexxus SA is the powerhouse your airsoft rifle deserves.

Specifications

• Brand: MechLabs
• Tank Compatibility: Up to 48/4500 (not included)
• Shots per Tank (w/ 48/4500): 3,000
• Fire Rate (Adjustable): 14-36 RPS
• Compatibility: Most Ver.2 compatible gearbox Airsoft AEGs
• Nozzle Included: M4 (other Ver.2 nozzles sold separately)

Features

• Full mechanical engine with no batteries required
• Durable and lightweight aluminum body construction
• Semi-automatic and full automatic firing modes via selector switch
• Adjustable trigger with slip-resistant grooves
• Ultra-fast trigger pull for enhanced responsiveness
• Air-efficient design capable of over 3000 shots on a 48/4500 HPA tank
• Designed for M4/AR15 platforms with Ver.2 gearbox compatibility
• Drop-in ready for external HPA regulator setups
• Optional stock tank kit available with built-in regulator
• MechLabs Nexxus engine offers a pure mechanical HPA solution
• Supports the HPA airsoft revolution with advanced trigger performance

Package Includes: 1x HPA Engine