User blog comment:Imrlybord7/TAR-21 vs UMP/@comment-1142365-20100329121442

UMP, great when used with a silencer. The 3-shot kill at any range without stopping power is a huge advantage to anybody. Also, the UMP, as someone else said, has vertical recoil. The TAR's is random recoil, so it is quite hard to try and counter it. Also, I like the UMPs iron sights.