Has anyone heard of J Young Mich. City? I have come across a barrel marked as such. It's 1 3/16 octagon barrel straight...no taper 31 inches long. This looks to be a 1/2 stocked barrel. It still has the under rib on the barrel and it's not screwed on. The under rib is 20" long. It looks to be 50 cal. I can't find my calipers...just scaled it.