The TEC-9 is a semi-automatic pistol originally designed in the 1980s by the Swedish company Interdynamic and later manufactured in the United States. It became widely known for its simple design, high magazine capacity, and military-style appearance.

The weapon is chambered in 9mm and is notable for its ability to accept large detachable magazines, often holding 20 to 50 rounds. Although it is semi-automatic (one shot per trigger pull), its design allows for rapid firing.

The TEC-9 gained notoriety due to its use in several high-profile crimes in the United States, which led to increased regulation and restrictions under laws such as the 1994 Federal Assault Weapons Ban. Because of this, it is often associated with discussions about gun control.

Overall, the TEC-9 is recognized for its compact size, high capacity, and controversial history rather than precision or reliability.