The ZCI CNC gearset 14:1 is a precision gear upgrade designed for airsoft players who demand high-speed trigger response and elevated rounds-per-second output. Built from hardened steel and finished via CNC machining, this gearset offers tight tolerances and consistent performance across extended play sessions.
Key Features
- 14:1 drive ratio – delivers rapid cycling and higher RPS with compatible springs
- CNC-machined steel construction – superior durability and precision fit
- Up to 40 RPS capability – achievable with M120 or lighter springs for extreme speed builds
- Ver. 2 & Ver. 3 compatibility – fits most common gearbox types across M4s, AKs, and SMGs
- Ideal for fast trigger response – excellent for CQB and speed-focused skirmish setups
Real-World Use Cases
High-speed gearsets suit players building dedicated fast-trigger platforms. Whether you’re running a lightweight CQB rifle or a support-role AEG, the 14:1 ratio maximises cycling speed without requiring extreme motor upgrades. Pair with an M120 spring or lighter for optimal performance.
Technical Specifications
- Drive Ratio: 14:1
- Material: Hardened steel
- Manufacturing: CNC machining
- Maximum RPS: 40 (with M120 or lighter spring)
- Gearbox Compatibility: Ver. 2 & Ver. 3
- Recommended Spring Range: M110–M150
Compatibility & Upgrades
This gearset is optimised for Ver. 2 and Ver. 3 gearboxes – the most common types found in M4 AEGs, AK platforms, and MP5-style SMGs. Pair it with a compatible high-torque or high-speed motor and an appropriate spring (M120 recommended for speed builds) to unlock its full potential. Ensure your gearbox shell and surrounding components are in good condition before installation.
UK Legal & Site Notes
Internal upgrades like gearsets do not affect the legal classification of your airsoft replica under UK law. However, always check your local skirmish site’s chrono limits and ruleset before deploying a speed-focused build – some sites cap RPS or enforce trigger discipline rules on high-speed weapons.
Upgrade your gearbox with ZCI precision engineering. Order your CNC gearset 14:1 from Airsoftdirect today and experience the difference that manufacturing excellence brings to trigger response and cycle speed.












