That's neat. Not because the gun was used to kill people, but because it has history.
Alcohol Tax Unit, Department of the Treasury, huh? The predecessor to everyone's favorite gov't agency, BATFE
To this day ATF is nothing but a glorified tax collection agency with overblown delusions of their own importance. But then, I might be a bit biased against them
One of my grandmother's uncles had a run-in with the Revenuers during Prohibition. He had a still in the woods and they got after him one day. While he was running, his shoe came untied. He eventually tripped over a tree root and the fed grabbed his untied shoe, which came off allowing him to escape. After that, he never tied his shoes