Oh my! I like that!
Would be more tempted if the barrel was ~4" shorter and it had a telescoping stock.
Why?
A 4" shorter case would be much easier to find places to stow. Current folded length is 16 1/2", at 12 1/2" long the carrying case could be pretty compact.
12" is plenty of barrel to get good velocity with 10mm.
Ballistics By The Inch suggests a probable 50 fps loss from 16".
I can't keep up with the BATFE's edicts. Would a collapsable stock make it a weapon of mass destruction?
All a moot point as the (D) government of my state has made it ill eagle here.