User blog comment:Imrlybord7/TAR-21 vs UMP/@comment-1367054-20100329002502

Well I don't know exact numbers but I know that the TAR has higher stopping power, penetration, and range stats. While the UMP is a great weapon, the TAR-21 is a rifle rather than a sub-machine gun. I would also say red-dot simply out of preference for the smaller dot. The UMP is a good weapon, but I've found the TAR-21 to be one of the most effective weapons in game.