FX STX Superior Slug Liner 1:24 twist

 
This FX Superior Smooth Twist X Heavy Barrel Liner or also named Slug liner or superior Slug, is a replacement for the original FX liner and is specially developed for the use of slugs.
They are created using the same patented, innovative exterior-pressed rifling, but using upgraded techniques and tighter tolerances for greater precision.
The Superior STX Heavy or Slug liner will shoot slugs with improved accuracy over the regular STX barrel (pellet) liners.