The Mini-Uzi has a cyclic rate of around 800 rounds per minute (vs. 600 rounds per minute from the standard Uzi, and about 1100 rounds per minute for the Micro-Uzi).
M means Modern, because it is a new model of the Ak-47 series, like UZI haves (UZI SMG, Mini UZI, Micro UZI, UZI Pistol).
Because it is smaller than the standard Uzi.
the mini uiz is smaller then the uzi and the mini Uiz shoots faster than the uiz
They are shaped like the Uzi but smaller, comparable in size to a MAC10 Ingram. The stock folds to one side on the Mini Uzi instead of under the receiver as on the full-sized Uzi. You should be able to type "Mini Uzi" and click on images for a look at them.
Mini Uzi has a faster rate of fire (cyclic rate of around 1100 rounds per minute vs. 600 rounds per minute).
You unlock the Mini Uzi the same way you unlock any weapon in multiplayer. You simply have to get to a high enough level. You can view what level it is unlocked at in the barracks under create a class under submachine guns.
Scar-H
They both are.
Scar-H
The Uzi was designed for one handed use and the variants (Mini-Uzi, Micro-Uzi and Uzi pistol) can to. The mac-10 and 11 can. The vz-61 scorpion can. The MP5 and variants can (SD & K). Basically any light gun with a small caliber or low recoil can be one handed. Some gums like the FN MAG can not even be fired easily standing up.
It can be purchased as either fully auto or semi auto.