|Heckler & Koch UMP|
|Used by:||CTU New York|
|Season(s):||5, 6, 7, 8|
|First episode:||"Day 5: 4:00pm-5:00pm"|
|Last episode:||"Day 8: 12:00am-1:00am"|
The Heckler & Koch UMP was a type of state-of-the-art submachine gun. It came in .45 or .40 variants, and had a 25 round magazine. It was used by CTU agents as well as by terrorist groups. (Operation Hell Gate)
Larry Moss investigated Mayer's death and noted that he was killed with a UMP .40. He deduced that Jack would have trouble acquiring such a weapon while on the run, casting doubt on Jack's supposed role in Mayer's death.