Replacement liner lock for the FX Impact & Dreamline which is required as part of the Caliber Exchange kit or to replace your orginal lock nut. 

[Need the whole kit? Find it Here - Impact Caliber Exchange Set .22 , Impact Caliber Exchange Set .25, Impact Caliber Exchange Set .30]

IMPORTANT NOTES FROM HUMA AIR:

• FX uses a medium strength treadlocker to fixate the transferport to the barrel to prevent the barrel coming loose. We strongly advice you to use a treadlocking adhesive like Loctite® 2400.
• Please check the FX Factory Exploded View before dismanteling the rifle.
  

• Changing from a larger caliber to a smaller caliber does not require any modifications to your shroud or moderator because the bore of the shroud and moderator will be large enough. When you go upwards to a larger caliber, you need to check the bore of the shroud and moderator, and if needed, open up the diameter of the bore of the shroud and moderator to match your new caliber.

  Minimum bore diameter for a fixed shroud would be:
  Cal .22 = 6,5 – 7 mm. bore
  Cal .25 = 7,5 – 8 mm. bore
  Cal. 30 = 8,5 – 9 mm. bore

  With a telescopic shroud, Huma advises you to use a larger bore as there can be some more movement in the construction so the pellets won’t clip.

  Minimum bore diameter for a telescopic shroud would be:
  Cal .22 = 7 mm. bore
  Cal .25 = 8 mm. bore
  Cal. 30 = 9 mm. bore