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DD AR 57 3.JPG
The AR-57
TypeSemi-automatic carbine Personal defense weapon
Place of originUnited States
Production history
ManufacturerAR57 LLC
Unit costUS$1,099
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]

The AR-57, also known as the AR Five Seven , is an upper receiver for the AR-15/M16 rifle lower receiver, 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.

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]

See also[edit]


  1. ^ a b c d "AR Five-seven Rifles: AR57A1 PDW Carbine". AR57 LLC. Retrieved 2010-04-05.
  2. ^ a b c "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. ^

External links[edit]