great interpretation. If anything the the fit and finish may be a bit too well done for a locally assembled gun using a misch-mosch of recycled parts in a similar-to-factory style.
In my research in rural eastern canadian museums in a previous occupational incarnation I saw a number of variations on that theme, some cut down to 30 or shorter barrels, rifle barrels replacing smoothbores, conversion to percussion, mixtures of furniture, restocking in north american wood, and any and all combinations there of. there were even some with old and very worn rather crudely done Indian carving and decoration--not just the brass tack thing.
The French system was a LOT different than the English. Most of the imported firearms were provided via government arsenals back in France. very little private civilian enterprise involved. Distribution to French-Canadian habitants and the indians, at least in theory, was done under colonial government regulation with policy set back in France. However the near-feudal control and in some cases, leased ownership, of the upper country trading posts and communities led to some very creative interpretation once the military and commercial traders got beyond the reach and eye of the Colonial authorities. Prior to the British takeover most of the classes of gun builder/repairmen were either government employees of contractors assigned to post and military units to provide services to military, Indian allies, and hibitant/courier-de-bois/voyageur doing "militia duty"