American Indians of the west did it. Guns might have a simple cross design or more complex patterns.
One of Kit Carson’s guns may have had them, but he gave the gun to a friend who was a mixed race, he may have added it.
During the 1970-90s period one would see them a lot on people doing Mountain Man. And as with Carson some white mountain men may have done it. Almost all Indian owned guns from the northern plains/ Mountain area had tacks
It didn’t get much to the south. We don’t see it on Navajo or Apache guns in the main. As far as I know the Carson rifle is the only known white mans gun from that time.
It was never a ‘thing’ in the east. So the late colonial period of Hawkeye was inappropriate.
however not real bad reseach. Such ‘buckskinner’ shows were common, and some one who went to a ‘voo would have seen plenty of tacked guns so it could get carried over in to a frontier show.
I loved tacks and had a pound stuck in most every gun I owned.
That was my miss spent youth. I doubt few white men had the in the west and none Indian or white in the east.