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.
The Tec-9 was originally the default pistol for the Terrorists, but due to its high ammo capacity and power, it was replaced by the Glock.
This is only weapon with 9mm bullet can kill a helmeted player with a single headshot.
To many players, the Tec-9 is considered to be one of the most overpowered pistols in Counter-Strike: Global Offensive due to the penetration damage and high clip capacity. However, the accuracy of the Tec-9 is not always reliable at longer ranges.