ⓘ AR-57

                                     

ⓘ AR-57

The AR-57, also known as the AR Five Seven, is a Lower receiver for the AR-15/M16 rifle and an Upper receiver, firing 5.7×28mm rounds from standard FN P90 magazines. It was designed by AR57 LLC and is currently produced by AR57 of Kent, Washington, USA. The AR-57 PDW Upper is a new design on AR-15/M16 rifles, blending the AR-15/M16 lower with a lightweight, monolithic upper receiver system chambered in FN 5.7×28mm. This model is also sold as a complete rifle, supplied with two 50-round P90 magazines. The magazines mount horizontally on top of the front handguard, with brass ejecting through the magazine well. Hollow AR-15 magazines can be used to catch spent casings.

Unlike a standard AR-15 configuration, which uses a gas tube system, the AR-57 cycles via direct impact. There is a fully-automatic version is positioned as a competitor to the P90 and other weapons for self-defense.

                                     
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