The weapon in the game "Rainbow Six: Siege" is UMP45 with drum cartridges

The weapon in the game "Rainbow Six: Siege" is UMP45 with drum cartridges

UMP45 is a submachine gun developed and manufactured by Heckler&Koch. Heckler&Koch developed UMP as a lighter and cheaper successor to MP5, although both are still in production. UMP has been adopted by multiple countries/regions, including Brazil, Canada, and the United States. The US Army Special Forces 5th Special Forces Brigade has officially purchased a small number of UMPs equipped with. 45 ACP, some of which served in the early stages of the Iraq War, making them one of the most popular submachine guns deployed by US military personnel in recent conflicts around the world.