Lancer Tactical Gen 4 M4 AEG Gearbox Assembly w/ Nebula II ETU

Complete Gen 4 Performance Upgrade

The Lancer Tactical Gen 4 M4 AEG Gearbox Assembly is a genuine, factory-complete drop-in solution designed to instantly refresh or upgrade your M4 platform. Built with a reinforced gearbox shell and pre-assembled internal components, this unit provides reliable performance and durability under demanding field conditions.

Advanced Nebula II ETU Control System

Equipped with the integrated Nebula II ETU, this gearbox offers programmable fire modes including semi, burst, and full auto. Adjustable trigger sensitivity, pre-cocking functionality, and active braking work together to deliver faster trigger response, reduced overspin, and improved shot-to-shot consistency.

Smart Protection and Easy Installation

The built-in MOSFET enhances electrical efficiency while protecting critical components, and low voltage battery protection helps safeguard your LiPo batteries during use. A diagnostic LED indicator provides real-time system monitoring, and the pre-wired configuration ensures streamlined installation into most M4-style AEG receivers.

Features

• Genuine Lancer Tactical Gen 4 complete gearbox assembly
• Integrated Nebula II ETU system
• Programmable fire modes: semi, burst, and full auto
• Adjustable trigger sensitivity
• Pre-cocking function for faster trigger response
• Active braking system to reduce overspin
• Built-in MOSFET for improved electrical efficiency
• Low voltage battery protection for LiPo safety
• Diagnostic LED status indicator
• Reinforced gearbox shell for durability
• Drop-in upgrade solution for M4-style AEG platforms
• Pre-wired for streamlined installation