The Mini-Uzi returns in Call of Duty: Modern Warfare 2. In Modern Warfare 2, the Mini-Uzi is a much better weapon than its Call of Duty 4 counterpart, because its recoil has been significantly reduced. It is unlocked at Level 44 in multiplayer mode.
This weapon is now also a much more competitive alternative to the P90, boasting higher accuracy and keeping its slightly higher rate of fire, but with a smaller magazine size. The iron sights on this weapon are also quite clear and open, making attachments like the Silencer a viable option.
The Mini-Uzi is incredibly effective in close to mid-range combat when used with Stopping Power in maps such as Skidrow, Scrapyard, or Rust. It is also a good alternative to carrying a shotgun, as it is deadly when used in close quarters, which frees up the secondary weapon slot. The Mini-Uzi does however have a slow reload, and is very ineffective for reload canceling.
Equipping a silencer to the Mini Uzi is a viable option as muzzle flash and some opaque smoke exits the barrel of the gun, obstructing the view of the target. Scavenger is popular among Mini-Uzi users, due to its high fire rate. Despite its low starting ammo count, it also pairs well with Marathon, as it has very high mobility.