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DD AR 57 3.JPG
The AR-57
Type Semi-automatic carbine Personal defense weapon
Place of origin United States
Production history
Manufacturer AR57 LLC
Unit cost US$1,099
Weight 7.45 lb (3.4 kg) (AR-57 PDW) [1]
Length 30 in (762.0 mm) (AR-57 PDW) [1]
Barrel length 16 in (406.4 mm) (AR-57 PDW) [1]

Cartridge FN 5.7×28mm [2]
Feed system FN P90 detachable box magazines [2]
Sights M1913 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 an AR-15/M16 platform, 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. Retrieved 2010-04-05. 
  3. ^ "History of the AR-57". Rhineland Arms Inc. Retrieved 2010-04-05. 
  4. ^ "Patent US20110168009". Retrieved 2012-12-05. 
  5. ^

External links[edit]