One of my favorite assault weapons is the 1728 first pattern Long Land Service Musket, AKA the Brown Bess.........
I can get off 240 rounds an hour.........
I shot a replica of one of those at the gun range a few months ago. The replica was probably a much better made gun than an original.
Fun to shoot at the range as a novelty but useless in modern times for any kind of real use.
I wouldn't even take it black powder hunting. Too heavy and awkward. The "sights" are a joke for anything except point and shoot. Accuracy sucks beyond about 40 yds. The Brown Bess being smooth bore and flint pretty well sucked.
More modern black powder rifle designs with rifle bores and percussion caps are much better if you want to go that route.