Specna Arms M90 Tuning Spring for AEG

The Specna Arms M90 Tuning Spring for AEG is a high-quality main spring designed for airsoft players who wish to maintain or tune their replicas using reliable internal components. Thanks to the use of high-quality spring steel and carefully finished, flat-ground ends, this spring delivers consistent performance and a long service life.

Specna Arms is renowned for its high-quality upgrade parts for AEGs, and its M90 Tuning Spring is an excellent choice for players looking for a reliable replacement or upgrade spring.

Reliable performance for every AEG

The main spring is at the heart of every AEG’s powertrain. A high-quality spring ensures consistent gearbox operation and contributes to a smooth firing cycle.

The Specna Arms M90 Tuning Spring is designed to maintain its tension over the long term, ensuring that your replica’s performance remains consistent, even after intensive use.

This makes the spring suitable for:

• Maintenance of existing replicas.
• Gearbox overhauls.
• New AEG builds.
• A reliable replacement for worn springs.

Made from high-quality spring steel

Specna Arms uses high-quality steel in its manufacturing process, which is particularly suitable for springs that have to withstand thousands of compression cycles.

This means you’ll benefit from:

• High wear resistance.
• Long-term resilience.
• Consistent performance.
• Reliable performance during prolonged use.

This material quality helps the spring retain its properties for longer than cheaper alternatives.

Flat-ground ends

An important quality feature of Specna Arms springs is the finish on the ends.

The flat-ground ends ensure that the spring rests evenly on the spring guide and piston. This results in a more even distribution of force during each compression.

This contributes to:

• A gearbox that operates smoothly.
• Less mechanical stress.
• Uniform compression.
• Reliable operation of the internal components.

Suitable for AEG upgrades

The M90 is designed for use in AEG replicas and can be fitted to a wide range of gearbox configurations.

The final muzzle velocity of your replica is determined not only by the spring, but also by factors such as:

• The air seal.
• The cylinder configuration.
• Give the nozzle.
• The entrance hall.
• The hop-up.
• The overall condition of the gearbox.

That is why the same M90 spring can produce varying results in different replicas.

Colour-coding for easy identification

The spring is fitted with a coloured tip, allowing you to quickly identify which spring you are holding during maintenance or upgrades.

This is particularly useful when you use several feathers or regularly work on different replicas.

Ideal for maintenance and overhauls

After prolonged use, a main spring may gradually lose its tension. Fitting a new, high-quality spring straight away during a gearbox overhaul will ensure that the replica continues to function reliably.

The Specna Arms M90 is therefore an excellent choice for:

• Preventative maintenance.
• Revisions.
• Replacement of worn springs.
• New internal builds.

Practical insights

Although many players focus on upgrades such as motors, gears or hop-up components, a high-quality main spring forms the basis of a reliable gearbox.

The combination of high-quality spring steel and precision-finished ends ensures that the Specna Arms M90 delivers consistent performance over the long term. When paired with a well-shimmed gearbox and a proper air seal, this spring helps to ensure that the replica operates smoothly.

Who is the Specna Arms M90 Tuning Spring suitable for?

The Specna Arms M90 Tuning Spring is ideal for airsoft players and technicians looking for a reliable main spring for an AEG. Whether you’re maintaining an existing replica, overhauling a gearbox or putting together a new build, this spring offers a durable, high-quality solution.

Always check that the spring you have chosen falls within the FPS or joule limits of the playing area you are using, and adjust the other internal components accordingly.

Key features

• M90 tuning spring for AEG replicas.
• Made from high-quality spring steel.
• Flat-ground ends for an even load.
• High durability and a long service life.
• Suitable for maintenance, overhauls and upgrades.
• Coloured tip for easy power recognition.
• Developed by Specna Arms.

Common mistakes

A common mistake is to assume that an M90 spring always produces the same muzzle velocity. The actual performance depends on the replica’s entire internal configuration, including the air seal, cylinder, nozzle and barrel length.

During maintenance, you should also check the condition of the spring guide, piston and gearbox to ensure you get the most out of a new main spring.

Frequently Asked Questions

Is this spring suitable for any AEG?
The Specna Arms M90 is designed for use in AEG replicas with a compatible gearbox.

What material is the spring made of?
The spring is made from high-quality spring steel, which ensures a long service life and consistent performance.

Why are the ends ground flat?
Flat-ground ends ensure an even load on the spring and help the gearbox to operate smoothly.

What is the coloured tip for?
The colour coding makes it easy to quickly identify the spring’s tension during maintenance or upgrades.

Does an M90 always deliver the same FPS?
No. The final muzzle velocity depends on the replica’s overall configuration, including the muzzle seal, barrel length, cylinder and other internal components.

With the Specna Arms M90 Tuning Spring for AEG, you’re choosing a durable and precision-finished main spring that provides a reliable foundation for maintenance, overhauls and AEG upgrades. Thanks to the high-quality spring steel and meticulous finish, you’re assured of consistent performance and a long service life.