This caliber exchange set with V2 dual hole transfer port and high flow pin probe makes it possible to change the caliber of your FX Crown 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 pin probe 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 Crown with a liner of the same length and a different caliber.
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 advise 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 Pin Probe is Included
High flow set, dual hole transfer port with middle support bridge and high flow stainless steel pin probe to get the maximum airflow out of your FX Crown.
Up To 48% Larger Passage Area.
In cooperation with some of the leading FX tuners we have made a high flow transfer port with a middle support bridge which divides the transfer port into a dual hole port.
This middle bridge makes sure the pellet or slug nose cannot fall into the enlarged transfer port hole but will be guided smoothly by the middle bridge into the barrel.
This set also includes our high flow, stainless steel, pin probe.
Together, this set will give the maximum airflow behind the projectile.
We have modified the O-ring groove dimensions and locating notch of the transfer port to be compatible with both the newest rifles as well as the older versions from FX.
Before tightening the grub screw that holds the barrel in the breech, make sure the barrel is adjusted properly so the magazine slides in and out smoothly.
Contact us if you need any customization and we shall be happy to get it done for you.
If you have any further query about the listed product you can use the above link to “Ask a Question”