G&P Ultra Precision Gun Smith Gearbox Shim Set (40 Pieces)

A properly shimmed gearbox is the foundation of a smooth, efficient, and long-lasting airsoft AEG. The G&P Ultra Precision Gun Smith Gearbox Shim Set is a technician-grade solution designed to help builders, techs, and serious players fine-tune their gearbox internals with absolute precision. Featuring accurately machined shims in two essential thicknesses, this set is trusted and widely recommended by Evike.com certified technicians for its consistency, durability, and perfect fit.

Whether you’re performing a basic tune-up, a full gearbox rebuild, or dialing in a high-performance setup, this shim set provides the control needed to reduce friction, noise, and wear—resulting in a more reliable and efficient airsoft rifle.

Precision Matters in Every Gearbox Build

Shimming is one of the most critical yet overlooked steps in AEG tuning. Poorly shimmed gears can cause excess noise, inefficient power transfer, premature wear, and even catastrophic gearbox failure. The G&P Ultra Precision Shim Set is engineered specifically to eliminate those issues by giving you accurate, repeatable spacing between gears.

Each shim is manufactured to tight tolerances, ensuring consistent thickness across the entire set. This allows technicians to fine-tune gear height and alignment with confidence—especially important when working with high-torque motors, upgraded springs, or precision gear sets.

Complete Set for All Gearbox Types

This set includes 40 total shims, divided into two of the most commonly used thicknesses in airsoft gearbox tuning:

• 0.1mm thick shims – 20 pieces

• 0.2mm thick shims – 20 pieces

This combination provides maximum flexibility when setting gear height and spacing, allowing for both micro-adjustments and more substantial corrections. The shims are compatible with all standard airsoft gearboxes, including Version 2, Version 3, and other common AEG platforms.

Whether you’re working on an M4, AK, MP5, or custom build, this shim set gives you everything needed to achieve a smooth, balanced drivetrain.

Trusted by Professional Airsoft Technicians

The G&P Ultra Precision Gun Smith Gearbox Shim Set is highly recommended by Evike.com certified technicians, and for good reason. The diameter, thickness accuracy, and material quality of these shims make them easier to work with compared to generic or low-quality alternatives.

When every fraction of a millimeter matters, having reliable shims reduces trial-and-error, speeds up the tuning process, and ensures consistent results across multiple builds.

Durable Construction for Long-Term Reliability

Built to withstand the stresses of high-speed and high-torque setups, these shims maintain their shape and thickness under load. This durability helps keep your gearbox running quietly and efficiently over time, even during extended gameplay or competitive use.

By reducing unnecessary friction and gear misalignment, proper shimming also protects your motor, gears, bearings, and bushings—extending the life of your entire gearbox system.

Ideal For

• Professional airsoft technicians

• Advanced AEG builders and tuners

• Gearbox rebuilds and upgrades

• Reducing gearbox noise and wear

• Improving efficiency and reliability

• Stock or high-performance builds

Why Choose G&P?

G&P is known worldwide for producing high-quality airsoft internals and accessories trusted by technicians and enthusiasts alike. The Ultra Precision Gun Smith Gearbox Shim Set reflects that reputation, offering professional-grade accuracy and reliability in an essential tuning component no serious builder should be without.

If you’re aiming for a quiet, smooth, and durable gearbox, this shim set is a must-have in your workbench arsenal.