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Ruger AR-556 MPR 350 Legend Rifle


The Ruger AR-556 MPR 350 Legend Rifle features a precision design focused on making full use of the straight-walled .350 Legend cartridge. This Ruger rifle is built with a two-stage Ruger Elite 452® AR-trigger that offers a smooth trigger pull with more reliable ignition and faster lock time. A radial port muzzle brake on this tactical rifle more effectively controls gases to reduce recoil and muzzle jump to improve comfort and shot-to-shot accuracy. A pistol-length gas system further reduces recoil as well as offering smoother operation and firing. This customizable rifle features Magpul M-LOK® attachment slots for easy accessory mounting as well as a collapsible MOE SL® buttstock that allows adjustment of the length of pull. The upper receiver features forward assist to ensure a solid bolt lockup as well as a brass deflector and dust cover for added durability. Perfect for the hunter looking to optimize straight-walled rifle rounds, the Ruger AR-556 MPR 350 Legend Rifle delivers dependable performance and a customizable feel.


  • Magpul MOE® grip and MOE SL® collapsible buttstock
  • Radial port muzzle brake reduces recoil and muzzle jump
  • Ruger Elite 452® AR-trigger offers a smooth 4.5 lb trigger pull
  • Two-stage trigger offers consistent ignition and faster lock time
  • Chrome-plated bolt carrier and gas key provide heat resistance
  • Magpul M-LOK® attachment slots for quick accessory mounting
  • Slim free-floated handguard for improved accuracy and ergonomics
  • Pistol-length gas system offers reduced recoil and smoother operation
  • Cold hammer-forged barrel with ultra-precise rifling delivers enhanced reliability
  • Upper receiver features forward assist, brass deflector, and dust cover for maximum performance and durability


  • Capacity: 5
  • Grooves: 5
  • Height: 7.3 in.
  • Weight: 6.6 lb.
  • Caliber: 350 Legend
  • Rate of Twist: 1:16
  • Barrel Length: 16.38 in.
  • Thread Pattern: 1/2″-28 x 0.4″
  • Length of Pull: 11.10–14.40 in.
  • Overall Length: 33.38–36.63 in.
  • Stock Material: Synthetic
  • Receiver Material: Aluminum
  • Barrel Material: Chrome-moly steel
  • Finish: Type III hard coat anodized


  • Detachable box magazine


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