Good article on H&K's UMP9. What's the betting line on whether or not Hans owns one (you can be sure he's fired one).
UMP9: Hands on with the Heckler & Koch - The Mag Life
The HK UMP (including the UMP9 from these photos) is the Jan Brady of sub-guns. It's stuck, mostly unloved, between the MP5 and the MP7.
gunmagwarehouse.com