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FX Airguns

FX Airguns - Superior STX Heavy Liner, .25 Cal, 700mm (FX20659S)

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MSRP: $129.99
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Elevate Your Shooting with the FX Superior STX Heavy Liner, .25 Cal, 700mm

Introduction to FX Superior Smooth Twist X Heavy Barrel Liner

Upgrade your long-range shooting capabilities with the FX Superior STX Heavy Barrel Liner. Specially designed for .25 caliber FX air rifles, this 700mm heavy liner is the ideal enhancement for those who demand improved performance with heavier pellets and slugs. Discover how this customized twist rate and advanced rifling technology can transform your shooting experience.

Enhanced Performance with Customized Twist Rate

The FX Superior STX Heavy Barrel Liner stands out by allowing shooters to use heavier projectiles while achieving superior accuracy and performance. Unlike standard Superior STX barrel liners, this heavy version incorporates a unique twist rate optimized for heavier ammunition, ensuring tighter groupings and more precise long-range impacts.

Innovative Design for Greater Precision

Manufactured with FX Airguns' revolutionary exterior-pressed rifling technology, the Superior STX Heavy Liner boasts tighter tolerances and enhanced techniques. These upgrades result in greater precision, making it an essential upgrade for serious shooters. The 700mm length not only increases projectile speed but also enhances stability for long-range accuracy.

Compatibility and Specifications

  • Compatible Models: Designed to fit seamlessly with FX Crown Continuum, Impact, and Wildcat models equipped with 700mm STX barrels, this liner is versatile and easy to install.
  • Caliber: .25 (6.35mm)
  • Weight: Lightweight at only 0.25 lbs, it is easy to handle and minimizes overall gear weight.

Perfect for Long-Range Shooting

The length of the Superior STX Heavy Liner not only provides a little extra speed compared to shorter versions but also stabilizes the projectile over longer distances. This makes it particularly effective for long-range shooting scenarios, whether you're engaged in competitive shooting or hunting.

Easy Upgrade for FX Air Rifles

Enhancing your FX air rifle is straightforward with the Superior STX Heavy Liner. Designed for easy installation, it's a simple "drop-in" upgrade that immediately improves the performance of your rifle with no permanent modifications required.

Why Choose the FX Superior STX Heavy Liner?

Choosing the FX Superior STX Heavy Liner means opting for advanced technology that enhances your shooting precision and effectiveness. It's an investment in quality and performance, tailored specifically for shooters who use heavier pellets and slugs to achieve exceptional results in competitive and recreational shooting.


The FX Superior STX Heavy Liner, 700mm, .25 caliber, is more than just a barrel liner; it's a performance enhancer for your FX air rifle. Suitable for a range of FX models, this barrel liner is designed to meet the needs of the most demanding shooters. Upgrade today and experience the pinnacle of precision and performance in long-range airgun shooting.

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Additional Information

.25 Cal
700mm Barrel
Model / Type:
STX Heavy
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