The groundbreaking Smooth Twist X barrel liner has been further perfected. FX Airguns proudly introduces the new FX Superior Smooth Twist X Barrel Liner (or FX Superior STX). The new Superior STX barrel liners are still created using the patented way of pressing the rifling into the barrel from the outside; but this is now done with a higher degree of precision, lower tolerance, and some other slight modifications that result in a superior liner to the standard STX liners. 

RESULTS ARE NOT GUARANTEED *THESE ARE NON-RETURNABLE PRODUCTS.

Twist rates:

• .22 – (1:24)
• .25 – (1:24)
• .30 – (1:40)
• .35 – (1:25)