My Great-Grandpa carried the "assault weapon" of his day when he was the neighboring county's sheriff in the early 1930s.
He carried a Winchester Model 1907 in .351 WSL.
Intermediate caliber, semi-automatic, detachable magazine.
He also carried a shotgun, but that was more so he could stop and shoot at birds as the mood struck him.
NRA Life Member
Ladyfriend: "I need help with the leaves in the yard"
Me: "Controlled burn?"
LadyFriend: "I forgot my Boy Scout turned into an infantry officer."