The FN SCAR is a family of gas-operated short-stroke gas piston automatic rifles developed by Belgian manufacturer FN Herstal (FN) in 2004. It is constructed with modularity for the United States Special Operations Command (SOCOM) to satisfy the requirements of the SCAR competition. This family of rifles consists of two main types. The SCAR-L, for "light", is chambered in 5.56×45mm NATO and the SCAR-H, for "heavy", is chambered in 7.62×51mm NATO. Both types are available in Close Quarters Combat (CQC), Standard (STD), and Long Barrel (LB) variants.

Fabrique Nationale Herstal, trading as FN Herstal and often referred to as Fabrique Nationale, Factory National, or simply FN, is a leading firearms manufacturer based in Herstal, Belgium, and former vehicle manufacturer. It was the largest exporter of military small arms in Europe as of 2012.