I think that this could well be a late rifle by Joseph R. Bean, who worked in Jo Davies County, Illinois, from 1830 to 1856. He was the youngest son of Russell Bean, of Tennessee fame. Joseph moved to Bad Axe, Wisconsin in 1856, and worked there, as well as farmed, until his death in 1868. In 1830, he was no doubt making most of his own parts out of necessity. By 1868, it was certainly more expedient to buy castings, as well as back-action locks. I was once in contact with one of his descendants in Wisconsin, who owned some of Joseph Bean's blacksmith tools. The tools were stamped "J. Bean".