FX Impact Smooth Twist X Superior Barrel Kit With this complete barrel kit Smooth Twist X Superior Liner for the FX Impact you can easily change the length and caliber of your FX Impact. The kit consists of a barrel with fixed shroud, a STX Superior liner and a pellet probe. If you only want to change the caliber of your rifle, you can also consider to use our Huma-Air caliber exchange kit with a FX Superior liner or FX Superior Heavy liner and re-use your excisting barrel components Available models and calibers: .177 / 4.5 mm fixed shroud, 500mm barrel, compact model. .177 / 4.5 mm fixed shroud, 600mm barrel, standard model. .177 / 4.5 mm fixed shroud, 700mm barrel, sniper model.
