Uzi
There are different kinds of Uzis: Mini Uzi, which is a smaller version of the Uzi; Micro Uzi, which is only slightly larger than a standard pistol; Para Micro Uzi, which was made for Counter Terrorist Units; and the Uzi Pistol, which is semi-automatic (it fires one bullet every time you pull the trigger).  All of these kinds of Uzis are still in use by the special forces today. It is slowly being replaced by the MP-5.