I've a friend who switched the focus of his collecting activities to collecting guns by African American makers. He has rifles from more than a dozen makers, as well as a couple of smoothbores and at least one pistol.
In 2020, right after covid hit, from an online estate auction in OH I picked up a old tea chest full of unspecified misc papers. (Kinda funny there--I hemmed and hawed for a day before bidding, because I mis-read the top bid as ""$200" instead of "$2.00". I entered a bid . . . and won the auction for $5!)
Among the papers were some correspondence from the Freedmen's Bureau, discharge papers from the USCT, various military insignia, a sergeant's notebook, a couple of daybooks, and a partial ledger. Turned out that after discharge, the gentleman had moved to OH and become a rifle maker. The daybooks and ledger were rather interesting. Like the only other such records of that time I've seen, they almost make me want to describe the owner as a sewing machine mechanic who occasionally worked on guns. The records I had ended about 1872, at which time he was still repairing guns and making the occasional rifle.
Sewing machine setup, maintenance, and repair was a big deal then, and it looked like he was well-paid for his work. From the records, the man was probably a respected member of his community. There were notes on various meetings he attended regularly, and frequent small debits for charities via his church, community, and lodge. I was a bit surprised to not run across mention of the GAR in his notes.
My friend now has the tea caddy etc, so it wasn't--and won't be--broken up. I'm not sure I'd have recognized the meaning of the package without his influence. It isn't like there are a lot of such records extant for us to see and learn from.