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Brand: FX Airguns
FX Superior Liner — STX Barrel (.177–.30 | 500–800mm)
£84.95
The FX Superior Liner is a precision-engineered STX barrel insert designed for FX rifles, delivering excellent accuracy, smoother harmonics, and repeatable performance. Available in .177, .22, .25, and .30 calibres with 500mm, 600mm, 700mm, and 800mm lengths.
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Free UK delivery £95+
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UK-based retailer • Authorised dealer • Manufacturer-backed warranty
UK authorised dealer • Manufacturer-backed warranty
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Description
FX Superior Liner — Overview
The FX Superior Liner is a premium STX barrel insert engineered to deliver outstanding precision and consistency across all shooting styles. Manufactured to tight tolerances, it enhances pellet and slug stability, reduces bore friction, and improves harmonics for tighter, more consistent groups.
Designed as a direct-fit replacement for a wide range of FX air rifles, the Superior Liner allows you to fine-tune your setup by selecting the ideal calibre and barrel length — without the need to replace the entire barrel assembly. Perfect for shooters who value accuracy, reliability, and the flexibility to adapt their rifle’s performance to different pellets, slugs, and shooting distances.
Key Features:
Precision-manufactured STX liner for superior bore consistency and harmonics
Compatible with .177, .22, .25, and .30 calibres
Length options: 500mm, 600mm, 700mm, 800mm
Direct-fit design for easy installation
Improved stability for pellets and lightweight slugs
Ideal for target, field, and hunting setups
Compatible FX Models:
Impact (MK2, M3 & M4), Maverick, Crown (MK1 & MK2), Wildcat MK3, Dreamline (all versions), Panthera, Dynamic, King, DRS, Leopard
Specifications
| Specification | Details |
|---|---|
| Product Name | FX Superior Liner |
| Type | STX Barrel Liner — Precision STX Design |
| Calibres | .177 (4.5mm), .22 (5.5mm), .25 (6.35mm), .30 (7.62mm) |
| Lengths Available | 500mm, 600mm, 700mm, 800mm |
| Compatibility | Impact (MK2, M3 & M4), Maverick, Crown (MK1 & MK2), Wildcat MK3, Dreamline (all versions), Panthera, Dynamic, King, DRS, Leopard |
| Installation | Direct-fit, drop-in replacement (no gunsmithing required) |
| Best For | Pellet and light slug accuracy, stable harmonics, consistent performance |
Superior vs Superior Slug — Comparison
| Feature | Superior Liner | Superior Slug Liner |
|---|---|---|
| Optimised For | Pellets and light slugs | Heavy slugs / long-range accuracy |
| Rifling / Twist | Standard STX twist for pellet stability | Faster twist profile for slug stabilisation |
| Accuracy Range | Short to mid-range precision | Mid to long-range consistency |
| Recommended Use | Target shooting, plinking, general hunting | Long-range target or hunting with heavy slugs |
Product Specification
| Brand | FX Airguns |
|---|---|
| Barrel Length | 500mm, 600mm, 700mm, 800mm |
| Calibre | .177 Calibre, .22 Calibre, .25 Calibre, .30 Calibre |
Whats Included
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