Fx airgun barrel question ,fac

[Aggy]

Hi guys when I had an Fx impact on ticket I bought a .30 barrel kit for it sold the gun and now have a very limited market to sell the kit .

it is identical in every way to a non fac barrel and is made up of the following parts 

the breech section,screws off 

a double threaded section ,screws off 

the outer sleeve ,they are all the same ,basically thin tube the other parts screw in to 

the jam nut ,holds the liner in the outer 

shroud with empty moderator 

and the .30 liner itself ,the only bit the pellet touches .

so what bit is the barrel , all of it or just the liner ?

no numbers on any of it 

thanks guys