On the online game all you have to do is complete all the challenges for all the sub machine guns on the online game then you will be able to select gold uzi on the uzi's menu. Ahh but do you know how to get the golden dildo!?
You will unlock it at level 13: Staff Sergeant.
you have to get 150 headshots with all of the guns in that class. Eg: Get 150 headshots with all the smg and then you will get a golden mini uzi
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.
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).
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).
No.1-mp44 No.2-Ak-74u No.3-Saw No.4-Mini Uzi No.5-M21 No.6-RPD No.7-M60E4 No.8-MP5 No.9-P90 No.10-G36C
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).
Scar-H
They both are.