I also think TC only offered screw in full chokes for the VR barrels, whether a 410 only or 45/410 barrel. I have a 21" VR 410 only barrel and its choke is full. The 2 45/410 pistol length barrels I had (one a VR and the other with open sights) were also choked full, but used a "star" wrench instead of the single blade wrench the carbine length barrel uses.
As suggested it is possible another vendor offered other chokes, but I sure don't remember any who did.