Assault rifle

An assault rifle is a select fire rifle that uses an intermediate-rifle cartridge and a detachable magazine. Assault rifles were first put into mass production and accepted into widespread service during World War II. The first assault rifle to see major usage was the German StG 44, a development of the earlier Mkb 42. While immediately after World War II, NATO countries were equipped with battle rifles, the development of the M16 rifle during the Vietnam War prompted the adoption of assault rifles by the rest of NATO. By the end of the 20th century, assault rifles had become the standard weapon in most of the world's armies, replacing full-powered rifles and submachine guns in most roles. The two most successful modern assault rifles are the AK-47 and the M16 designs and their derivatives.

The term assault rifle is generally attributed to Adolf Hitler, who used the German word Sturmgewehr (which translates to "assault rifle") as the new name for the MP 43 (Maschinenpistole), subsequently known as the Sturmgewehr 44. Allied propaganda suggested that the name was chosen for propaganda purposes, but the main purpose was to differentiate the Sturmgewehr from German submachine guns such as the MP 40.

It has been suggested, however, that the Heereswaffenamt was responsible for the name Sturmgewehr, and Hitler had no input besides signing the production order. Furthermore, Hitler was initially opposed to the idea of a new infantry rifle, as Germany lacked the industrial capacity to replace the 12,000,000 Karabiner 98k rifles already in service, only changing his mind once he saw it first-hand.

The StG 44 is generally considered the first selective fire military rifle to popularize the assault rifle concept. Today, the term assault rifle is used to define firearms sharing the same basic characteristics as the StG 44.

The U.S. Army defines assault rifles as "short, compact, selective-fire weapons that fire a cartridge intermediate in power between submachine gun and rifle cartridges." In this strict definition, a firearm must have at least the following characteristics to be considered an assault rifle:

Rifles that meet most of these criteria, but not all, are not assault rifles according to the U.S. Army's definition. For example:

In the United States, selective-fire rifles are legally defined as "machine guns", and civilian ownership of those has been tightly regulated since 1934 under the National Firearms Act and since 1986 under the Firearm Owners Protection Act. However, the term "assault rifle" is often conflated with "assault weapon", a U.S. legal category with varying definitions which includes many semi-automatic weapons. This use has been described as incorrect and a misapplication of the term.

The Fedorov Avtomat (also anglicized as Federov, Russian: Автома́т Фёдорова, romanized: Avtomát Fyódorova, IPA: [ɐftɐˈmat ˈfʲɵdərəvə], lit. 'Fyodorov's automatic rifle') is a select-fire infantry rifle and also one of the world's first operational automatic rifles, designed by Vladimir Grigoryevich Fyodorov in 1915 and produced in the Russian Empire and later in the Russian Soviet Federative Socialist Republic. A total of 3,200 Fedorov rifles were manufactured between 1915 and 1924 in the city of Kovrov; the vast majority of them were made after 1920. The weapon saw limited combat in World War I, but was used more substantially in the Russian Civil War and in the Winter War. Some consider it to be an "early predecessor" or "ancestor" of the modern assault rifle.