The AR-57, also known as the AR Five Seven, is a 5.7x28mm upper receiver conversion for the AR-15 lower receiver. 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||Fires in full-auto||2007|
|Counter-Strike Online 2||2013|
|Sword Art Online: Fatal Bullet||"SPB Rapier"||2018|