The Tec-9 sub machine gun is pretty much the modern day Tommy gun. It's used by hundreds of street gangs and terrorists. Though the full-auto version is extinct, you can by them in some places of America in gun stores in semi-automatic for very cheap (because they are not very accurate or reliable), but they can be converted to shoot full-auto very easily, that’s why they are so popular, and they are also light and compact and pack a high volume of firepower - you can get up to 50 round magazines!
"Give me a strap!" "Hear, take my Tec 9!"