FX Impact Caliber Change Kit

( 0 Reviews )

FX Impact Caliber Exchange Set with V2 Dual Hole Transfer Port and High Flow Pin- or Pellet Probe By Huma-Air


This caliber exchange set with V2 dual hole transfer port and high flow pin OR pellet probe (select one) makes it possible to change the caliber of your FX impact with the use of your existing barrel sleeve and barrel shroud.
The set exists of a stainless steel barrel attachment with our V2 dual hole transfer port, a liner lock nut, a high flow pellet/slug probe OR a pin probe (select one) and the supporting O-rings for the optional FX liner inside the barrel sleeve (the liner itself is not included)

By using this kit, your existing barrel sleeve and shroud, you can change the liner of your FX Impact with a liner of the same length and a different caliber.

(Also available for the FX Dreamline)


FX uses a medium strength thread locker to fixate the transfer port to the barrel to prevent the barrel coming loose. We strongly advice you to use a thread locking adhesive like Loctite® 2400 also

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 an telescopic shroud we would advice 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

Dual Hole V-2 Transfer Port and High Flow Pellet- and slugprobe OR Pin Probe Included:

The V-shaped transfer opening makes sure you will have the maximum and smoothest air passage area. The middle support bridge divides the transfer port into a dual hole port and the middle bridge makes sure the pellet or slug nose cannot fall into the enlarged transferport hole, but will be guided smoothly by the middle bridge into the barrel. This set also includes our high flow, stainless steel, pellet and slug probe OR a stainless steel Pin Probe. Together, this set will give the maximum airflow behind the projectile. These sets are developed for slugs and pellet use! and can be used in combination with our power tuning hammer spring. The liner itself is not included, you can order the FX Superior Liners or order the FX Superior Heavy Liners.

Current stock:

0 Reviews

Be the first to review this product.

Add a Review