FX Superior Heavy STX Barrel Liner .22 700mm Pellet/Slug
S83325
The FX Superior Heavy Smooth Twist X (STX) barrel liner is a replacement rifled liner for FX PCP air rifles, made using FX's patented method of pressing the rifling into the barrel from the outside. This 700mm liner is chambered in .22 calibre and runs a 1:16" twist rate specifically suited to heavier pellets and heavier slugs. Lightweight projectiles such as the FX Hybrid Slug are better served by the standard Superior liner. The "Heavy" designation does not refer to a thicker barrel wall — per FX, it denotes a different twist rate optimised for heavier pellets and heavier slugs rather than lighter-weight Hybrid Slugs. At 700mm this is the longest .22 Superior Heavy liner available, giving maximum dwell time and the potential for higher muzzle velocity and flatter trajectories when running heavier projectiles at range. It is sold as a standalone accessory and is not included in any barrel kit. Supported platforms are the FX Impact, Crown, Wildcat and Dreamline. FX part number 20206.
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