Questions about Thule Force XT Sport

The mounting brackets have a very wide range and should be compatible with most roof racks. Montblanc has different models, so it is not possible to say in general terms, but it will certainly fit on an AMC.

yes fits, but the lock, the locking mechanism and the key are a disaster, absolutely cheap

No, unfortunately this one does not fit. Fits Thule WingBar Evo ✓ Fits Thule WingBar ✓ Fits Thule SquareBar Evo ✓ Fits Thule SlideBar ✓ Adapter/s required: Thule T-track Adapter 697-6 Fits Thule ProBar Evo ✓

I have mounted it on a Fiat Ducato, wingable, should actually work, the box is not so wide.

Here you can check whether the existing one is compatible with the new one you want: https://www.thule.com/de-de/buyers-guide?c=roof+racks