The UMP-45 is a submachine gun used by the Counter-Strike: Global Offensive. It is one of the most popular submachine guns in the game. This weapon has been painted with a Fallout 4 design, since it is one of the most successful video games of 2017. Exchange your Soul Gems for the UMP-45 Fallout Warning. Counter-Strike: Global Offensive is another part of the game series called Counter-Strike. UMP-45 is a submachine gun used by terrorists, which has a high fire rate and medium damage. It was painted with Fallout 4 logos as a template. Exchange your Soul Gems for the UMP-45 Fallout Warning.