Without a certified chain of custody it is impossible to determine the exact origin of any gun especially one almost 250 years old. Richard Wilson has been documented as a gunmaker for the HBC from 1730-1756. Did he make enough locks/plates to meet the needs of the Company from 1756 to 1800 I doubt it the Company purchased several thousand guns during this period. Were his locks used after he stopped making guns, probably. Were his locks used on guns made by others most likely. Were his locks taken off original guns and put on new guns with parts from other gun makers almost certainly.
This begs the question, which parts of flint lock gun constitutes the gun? The lock, barrel, stock, trigger guard, ram rod thimbles, butt plate, side plate? 1/4 of these parts, 1/2, 3/4s.