The FM1957 is a Swedish

prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototyp ...

battle rifle A battle rifle is a service rifle chambered to fire a fully powered cartridge. The term "battle rifle" is a retronym created largely out of a need to better differentiate the intermediate cartridge, intermediate-powered assault rifles (e.g. the S ...

based on the

Ag m/42 A&G, AG, Ag or ag may refer to Businesses and organizations * A&G Railroad (former reporting mark AG) * Action Group (Nigeria), a political party during the Nigerian First Republic * Aktiengesellschaft, a German type of corporation * Assembl ...

semi-automatic rifle A semi-automatic rifle is an autoloading rifle that fires a single cartridge with each pull of the trigger, and uses part of the fired cartridge's energy to eject the case and load another cartridge into the chamber. For comparison, a bolt-act ...

. Along with the

FN FAL The FAL (a French acronym for (English: "Light Automatic Rifle")), is a battle rifle designed in Belgium by Dieudonné Saive and manufactured by FN Herstal (simply known as FN). During the Cold War the FAL was adopted by many countries of th ...

, M14 rifle, Rk 60 and

GRAM 63 battle rifle The GRAM 63 is a prototype battle rifle that was in trials to replace the semi-automatic Ag m/42 in Swedish Army service and was manufactured by Bofors Carl Gustaf. However, it lost to the license-produced H&K G3 known as the Ak 4. See also *Se ...

, it was in competition to replace the bolt action Mausers and the Ag m/42B rifles in Swedish service during the early 1960s but lost over the Heckler & Koch G3 (license built as the

Ak 4 The Ak 4 (Swedish: ''Automatkarbin 4'') is a Swedish-made version of the Heckler & Koch G3A3 battle rifle. It has been produced in several versions, with minor changes and upgrades. The original Ak 4 model (Ak 4A) featured a buttstock that is ...

in Sweden). The FM57 therefore never entered serial production. The rifle was built in two calibers: the 6.5×55mm (standard in the Swedish Armed Forces at the time) and the

7.62×51mm NATO The 7.62×51mm NATO (official NATO nomenclature 7.62 NATO) is a rimless, bottlenecked rifle cartridge. It is a standard for small arms among NATO countries. First developed in the 1950s, the cartridge had first been introduced in U.S. service fo ...

(which later replaced the 6.5 mm cartridge in Swedish service).

External links

Swedish military assault rifles 1945 - 1990, Ak4 and Ak 5.
7.62×51mm NATO battle rifles Rifles of Sweden Trial and research firearms of Sweden {{Rifle-stub