Or -- similar to AKSUs in the hands of Russian tough guys -- illegal as hell, but whatcha you pissant cop with your Makarov gonna do about it!?
Trouble is, automatic weapons require skill to be effective, so taking one from the enemy doesn't guarantee having firepower. Those of you who have M16/MP5/military weapons, teach others to use them...just in case.
http://ddb.com/RKBA/oct98/s_learn.jpg