The Intratec TEC-9 is a blowback-operate, semi-automatic 9x19mm Parabellum caliber firearm, classified by the Bureau of Alcohol, Tobacco, and Firearms as a handgun. It is made of inexpensive molded polymer and stamped steel parts. Magazines holding 10-, 20-, 32-, 36- and upwards of 50-round capacities are available. There are three different models, all of which are commonly referred to as the TEC-9, although only one model was actually sold under that name.