ZCI V2 Uprated Complete Gearbox with Mosfet

The ZCI V2 Uprated Complete Gearbox with Mosfet is a plug-and-play upgrade solution for AEG owners looking to enhance trigger response, durability, and ease of maintenance. This pre-assembled unit combines quality internals with electronic protection, ideal for skirmishers and milsim players who demand reliable performance without the complexity of custom building.

Key Features

• Quick-Change Spring System – swap spring rates without full disassembly
• 8mm Steel Bearings – reduced friction and improved longevity in high-use scenarios
• Pre-Fitted Mosfet – safeguards against electrical stress and enables advanced trigger programming
• Complete V2 Gearbox Shell – drop-in compatible with standard M4/M16-pattern receivers
• Uprated Construction – engineered for sustained semi and full-auto fire

Real-World Use Cases

Perfect for players upgrading worn internal gearboxes or building custom AEGs. The QD spring change lets you quickly adapt to different site chronograph limits or field regulations. The mosfet provides electrical safety during intensive play sessions and is ideal if you plan future upgrades like programmable fire control units.

Technical Specifications

• Gearbox Type: V2 Complete Assembly
• Bearings: 8mm Steel
• Spring Change: Quick-Change (QD)
• Mosfet: Pre-installed

Compatibility & Upgrades

This V2 gearbox suits most M4, M16, and AK-pattern AEGs with standard V2 gearbox cavities. Pair with a quality spring rated to your desired FPS and local site limits. The mosfet opens the door to programmable trigger units and burst control modules—check compatibility before purchasing add-ons.

UK Legal & Site Notes

As an internal component, the gearbox itself is unrestricted. However, ensure the complete AEG remains under your local site’s chronograph limit (typically 350–500 FPS with 0.20g BBs). Always verify site rules before fielding any upgraded platform.

Upgrade your AEG’s reliability and handling today with ZCI’s trusted performance gearbox solution.