Guarder Oil Temper Wire AEG Spring for Tokyo Marui Style AEG (SP-140)

The Guarder Oil Temper Wire AEG Spring SP-140 is a high-performance upgrade designed to increase the power and consistency of your airsoft AEG rifle. Engineered using oil-tempered steel wire and manufactured to strict quality standards, this spring delivers reliable compression, stable FPS output, and long-term durability for demanding airsoft builds.

Produced by Guarder, a well-respected manufacturer of premium airsoft upgrade components, the SP-140 spring is trusted by technicians and players worldwide who need dependable performance for upgraded gearboxes.

Whether you are building a high-powered field rifle or tuning your AEG for improved range and performance, the Guarder SP-140 spring provides the power increase and reliability required for consistent shooting.

High-Performance Oil Tempered Spring Design

One of the key advantages of the Guarder SP-140 spring is its oil tempered steel construction. Oil tempering is a heat-treatment process that strengthens the metal structure of the spring, allowing it to withstand repeated compression cycles without losing tension.

This advanced manufacturing method improves several important performance characteristics:

• Increased durability under heavy use

• More consistent FPS output

• Reduced spring fatigue over time

• Improved long-term reliability

Because the spring maintains its structural integrity for longer periods, it provides stable compression even after thousands of shots. This helps maintain consistent power levels and reduces the need for frequent replacement.

Increased Power for Upgraded AEG Builds

The spring inside an AEG gearbox is one of the most important components controlling muzzle velocity (FPS). When the piston compresses the spring during the firing cycle, stored energy is released to drive the piston forward and push air through the cylinder system.

Upgrading to a stronger spring such as the SP-140 increases the amount of energy released during this cycle, resulting in higher FPS and improved effective range.

This makes the SP-140 an excellent choice for:

• Outdoor field rifles

• DMR-style AEG builds

• Long-range airsoft setups

• High-performance upgraded gearboxes

When combined with proper compression components such as cylinder heads, pistons, and air seal nozzles, the Guarder SP-140 spring can significantly improve the overall power and efficiency of your AEG.

Consistent FPS Performance

Consistency is critical for accuracy and reliable gameplay. Poor-quality springs can suffer from uneven compression or tension loss, resulting in fluctuating FPS readings.

Guarder springs are widely recognized for their excellent consistency, delivering stable compression throughout the firing cycle. This helps maintain predictable BB velocity and improves shot-to-shot performance.

Stable FPS output not only improves accuracy but also helps ensure your rifle remains within field limits when properly tuned.

Compatible with Tokyo Marui Spec Gearboxes

The Guarder SP-140 spring is designed to work with Tokyo Marui specification AEG gearboxes, making it compatible with many of the most popular airsoft platforms available today.

Compatible gearbox types typically include:

• Version 2 gearboxes (commonly found in M4 / M16 rifles)

• Version 3 gearboxes (commonly found in AK-style rifles)

• Many other Tokyo Marui compatible AEG platforms

Because most modern airsoft rifles follow Tokyo Marui specifications, this spring offers wide compatibility across numerous brands and models.

It is also commonly used with rifles manufactured by brands such as Matrix and other TM-compatible AEG systems.

Easy Installation Upgrade

Installing a new spring is one of the most straightforward upgrades players can perform to increase the performance of their AEG. The Guarder SP-140 spring is designed for easy installation in compatible gearboxes.

However, when installing stronger springs, it is important to ensure the rest of the gearbox components are capable of handling the increased stress. Reinforced pistons, gears, and compression parts are often recommended when building high-power AEG setups.

Proper installation and tuning will help ensure the rifle operates smoothly and reliably.

Key Features

• High-performance SP-140 AEG upgrade spring

• Oil tempered steel wire construction for durability

• Provides increased FPS and power output

• Known for excellent compression consistency

• Compatible with Tokyo Marui specification gearboxes

• Suitable for Matrix and other TM-compatible AEG platforms

• Ideal for upgraded rifles and long-range builds

• Manufactured in Taiwan

Reliable Performance from a Trusted Brand

For players seeking a dependable power upgrade for their airsoft rifle, the Guarder Oil Temper Wire AEG Spring SP-140 delivers the durability, consistency, and performance expected from one of the most trusted names in airsoft upgrade parts.

Whether you're tuning your rifle for better range, building a powerful outdoor platform, or upgrading internal components for improved performance, the Guarder SP-140 spring is a proven choice for serious airsoft technicians and enthusiasts.

Visit us at CQCAirsoft.com for more airsoft upgrade parts, gearbox components, and performance accessories.