This Smooth Twist X barrel replaces the original Smooth Twist Barrel on older FX Impact air rifle, allowing the use of the new Smooth Twist X barrel sleeve system. Upgrade includes barrel and liner only.. In .22 caliber you receive the 500mm barrel with liner only. This fits with the Telescopic Shroud system.
Now you can upgrade your old Smooth twist barrel to the NEW STX barrel liner system
.22 caliber kit 500mm barrel. Kit does not include probe or shroud. Use your existing parts