User blog comment:Imrlybord7/TAR-21 vs UMP/@comment-1664757-20100329132133

The UMP is the better choice because it has more ammo (3 32-round magazines = 96 rounds instead of 3 30-round magazines = 90 rounds), has no idle sway, and predictable recoil. TAR has more available attachments, but the UMP is better because of those other stats (better hip-fire, mobility, and magazine size).