In multiplayer, the Mini-Uzi is unlocked at Level 13. It can be modified with a Red Dot Sight, Silencer or an ACOG Scope. It has a high rate of fire, but lacks power and range.
The Mini-Uzi deals 30-20 damage depending on range, making It a 4-5 shot kill. Stopping Power reduces the number of bullets needed to kill to 3-4. Head shots generally reduce the number of bullets needed to kill at most ranges by one.
High recoil and an exceptionally large muzzle flash make the Mini-Uzi difficult to use in mid-range combat, but it is effective in close quarters combat. The recoil pattern is 80 upward, 75 to each side, and 50 downward. These high values are exacerbated by the Mini-Uzi's slower than average center speed of 1600, together with its high fire rate of 950 RPM. Using Double Tap increases the rate of fire to 1269 RPM, meaning a full magazine lasts less than 1.5 seconds. Using Double Tap also renders the recoil almost unmanageable. However, if the recoil can be controlled this can make the Mini-Uzi time to kill third only to the Fang 45 and Skorpion with Double Tap at close range.
The Mini-Uzi has a slow draw time, making it a poor choice as a backup weapon. Its reload times, while only slightly slower than average on paper, is poor in practice because of its poor reload cancelling potential. The slightly larger than average magazine capacity of 32 does not make up for this weakness.
The Silencer is a natural fit with the Mini-Uzi. Not only does it eliminate the considerable muzzle flash, it also gives the user potential to stay hidden for longer and therefore reload uncontested. The Red Dot Sight can improve precision for an otherwise difficult-to-control weapon. The ACOG sight, however, is a poor fit, as it exacerbates the already considerable recoil and does little to make the Mini-Uzi more competitive at long range.
In the DS version of the game, although the HUD icon shows a full-sized Uzi, the 3D model of it is depicted as a Mini-Uzi. The way to tell is because the character uses his left hand to grip what appears to be a forward folded skeleton stock used as a grip, as seen on the Mini-Uzi. The full-sized Uzi's stock cannot be folded forward, indicating that the Mini-Uzi is actually included in the game, just having the wrong HUD. It is the main SMG used by the Insurgents. Performance wise, it is the same as the MAC-10, and is not available in multiplayer for this reason.
The Mini-Uzi is effective in close to mid-range combat, and to an extent, long range. However, it suffers from a somewhat slow reload and reload canceling is not very effective, so one should consider using a handgun as a secondary, since the player can quickly pull out a pistol when his/her primary weapon's magazine is empty. Although it has much less recoil than its Call of Duty 4: Modern Warfare counterpart, when equipped with Rapid Fire it earns a significantly large amount of recoil and for some players may be hard to control.
The Mini Uzi was cut from this game, but its textures (weapon_mini_uzi_new-col and weapon_mini_uzi) can still be found. It was most likely replaced by the PM-9 as they both have the same Create-A-Class picture.
In Call of Duty: Modern Warfare 2, the Create-A-Class picture and the third person view of the Mini-Uzi has its stock folded, like in Call of Duty 4: Modern Warfare, but is not present in first-person gameplay.
The Mini-Uzi was originally the weapon that was to be used with one hand while on snowmobiles (as shown at 1:02 in the Infamy trailer), but was replaced with the G18.
Unlike its Call of Duty 4: Modern Warfare counterpart, this Mini-Uzi doesn't have a fingerprint on the back.
When on the Zodiac in "Endgame", the Mini-Uzi has a slower rate of fire than in other parts of the game.
Despite being the "Mini-Uzi," its weapon emblems will say "Uzi".