Thirty rounds, one shot per trigger pull, and far more accurate than a musket? Yes, please!
Actually, Jefferson would probably geek out over them, seeing as he was a bit of a gun nut himself.
Also, as others have pointed out, they had CANNONS. That could be loaded with GRAPESHOT.
Think of a shotgun loaded with buckshot. Now increase the bore size five times over. Now multiply the number of pellets by twenty, and make them bigger.
Yeah. I don't think a Kalashnikov would horrify them.