We call it "The Eraser"

The Tec-9 was designed by George Kellegren and manufactured by Intratec, originating from Sweden and the U.S. Its production lasted from 1985, and ended in 1994, when it was originally banned in the U.S. by the Federal Assault Weapons Ban. The Tec-9 was more famously known as being made easy to accommodate modifications to give it fully-automatic submachine gun-style qualities, which also led to its ban. The Tec-9 holds 32 rounds of 9mm Parabellum pistol cartridge in-game. In game it starts with 120 rounds in reserve and 32 in the initial magazine. It costs $500 and kill award is default.