A sub machine gun describes automatic weapons that are smaller than assault rifles and fire pistol-caliber ammunition. Easily maneuvered and with relatively good fire power, SMGs such as the MP5 are used all over the world by military and law enforcement as well as some criminal organizations. There are a large number of sub machine guns in the Grand Theft Auto series including the [Micro SMG]], MP5, MAC-10, Tec-9 and the Scorpion. SMGs are found in great supply throughout all games, be it through gun shops, gang members, high-level law enforcement, or just laying around the city.
The SMG rendition in Chinatown Wars is undoubtedly an HK MP5A3, however the barrel appears to be "snub-nosed" (Stubby and short). The stock is concealed so that it is more portable and can be sprinted with and used in drive-bys. It has a fast rate of fire and good accuracy. It is available when the Fully Cocked Upgrade is purchased.