AR-57

The AR-57, also known as the AR Five Seven , is available as either an upper receiver for the AR-15/M16 rifle or a complete rifle, firing 5.7×28mm rounds from standard FN P90 magazines. It was designed by AR57 LLC[3] 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.[1] 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.

AR-57
The AR-57
TypeSemi-automatic carbine Personal defense weapon
Place of originUnited States
Production history
Designed2008–2016
ManufacturerAR57 LLC
Unit costUS$1,099
Specifications
Mass7.45 lb (3.4 kg) (AR-57 PDW)[1]
Length30 in (762.0 mm) (AR-57 PDW)[1]
Barrel length16 in (406.4 mm) (AR-57 PDW)[1]
CartridgeFN 5.7×28mm[2]
Feed systemFN P90 detachable box magazines[2]
SightsM1913 Picatinny rail[2]

Unlike the standard AR-15 configuration which uses a gas-tube system, the AR-57 cycles via straight blowback.[4] A full auto version exists marketed as a competitor to the P90 and other personal defense weapons.[5]

Users

See also
  • AR-15 variants

References
  1. "AR Five-seven Rifles: AR57A1 PDW Carbine". AR57 LLC. Retrieved 2010-04-05.
  2. "AR Five-seven Image Gallery". AR57 LLC. Archived from the original on 2011-07-07. Retrieved 2010-04-05.
  3. "Archived copy". Archived from the original on 2010-01-13. Retrieved 2010-01-13.CS1 maint: archived copy as title (link)
  4. "Patent US20110168009". Retrieved 2012-12-05.
  5. http://www.thefirearmblog.com/blog/2008/11/30/sneak-peek-of-suppressed-full-auto-ar57/
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