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Heckler & Koch MP5
- Caliber: 9 x 19 mm
- Magazine capacity: 30 rounds
- Rate of fire: 800 rounds/min
- Weapon length: 680 mm
- Barrel length: 225 mm
- Mass: 3,08 kg
- Max effective range: 200m
- Year produced: 1966.
- Place of origin: West Germany
A submachine gun, abbreviated SMG, is a magazine-fed, automatic carbine designed to fire handgun cartridges. The term "submachine gun" was coined by John T. Thompson, the inventor of the Thompson submachine gun, to describe its design concept as an automatic firearm with notably less firepower than a machine gun (hence the prefix "sub-"). As a machine gun must fire rifle cartridges to be classified as such, submachine guns are not considered machine guns.