The AR-57, also known as the AR Five Seven, is a 5.7x28mm upper receiver conversion for the AR-15 lower receiver manufactured by (now defunct) AR57 LLC. It uses FN P90 magazines mounted on the top of the receiver, while the ejected brass are dropped through the magazine well. It is sold as a semi-auto civilian weapon, but a full auto version exists.
The AR-57 and variants can be seen in the following films, television series, video games, and anime used by the following actors:
|Game Title||Appears as||Mods||Notation||Release Date|
|Cross Fire||Added post-release||2007|
|Alliance of Valiant Arms||Added post-release||2007|
|Counter-Strike Online 2||2013|
|Sword Art Online: Fatal Bullet||"SPB Rapier"||2018|
|Call of Duty: Modern Warfare II||"FSS Hurricane"||With conventional AR-style charging handle||2022|