There was a Lorenz that was short barrelled, sometimes called the "Jaeger." It had a distinctive trigger guard. I'm not sure if it was imported to the US, but it is sometimes confused for its longer cousin. I've seen it pictured in some very old books as the Lorenz (like the Official Military Atlas of the Civil War, for instance).
Pine River Boys, Co I, 7th Wisconsin
"We're... Christians, what read the Bible and foller what it says about lovin' your enemies and carin' for them what despitefully use you -- that is, after you've downed 'em good and hard."
-Si Klegg and His Pard Shorty