I nearly did a carbine project but sold the gun instead.
I have a TG serial (.22) barrel that I had reduced to 14.5 inches so 4 inches removed (therefore no front sight anymore of course).
I had the tip crowned and also threaded for a screw on silencer.
Being a TG it would be the Mk 4/5 articulated cocking link type (it was a Super I was doing though so Mk3). Not sure if that barrel would work with an earlier one piece link gun?
It has a Parker Hale silencer of unknown condition/quality and as it's almost 7 inches long, I realised I'd lost my carbine looking option, being 3 inches longer overall when screwed on.
The barrel has unsightly threads showing if the silencer isn't fitted so I lost interest and didn't go ahead.
Although it would ruin the originality of my Meteor Cadet I could try it on that but then it would need a scope and the thing about the Cadet version is the rear peep sight.
More likely I'll never use it so if the barrel interests you pm me.