I got one of these, incl the Boar in stainless. I just tried to fit a Mora Companion HD into the sheath, it fits ok, but it is not fixed at all, it will slide out.
The back of the sheath provides you with a belt loop for carrying the knife rather high on the hip and together 3 loops for horizontal carry. I improvised mine with an additional belt loop fixed with paracord for lower carry, but I would rather have a someway more traditional sheath like the one provided by Brisa for the Enzo Badger. But I do not know if it will fit the rather substantial Boar (I also use the sheath of the Trapper for my bushie made by Mark, but it is way too small and narrow for the Boar...).
Pic of the back of the sheath and the Companion will be added...
ATB Heinz