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Ruger® AR-556® MPR .450 Bushmaster


Out of stock

  • Lower receiver is fitted with Magpul® MOE® grip and MOE SL™ collapsible buttstock on the Mil-Spec buffer tube.

  • Handguard is free-floating for accuracy and the slim, 15″ length provides enhanced ergonomics and support.

  • Flattop upper receiver includes an enlarged window for easy ejection as well as forward assist, dust cover and brass deflector. CNC-machined from Mil-Spec forging and Type III hard coat anodized for maximum durability.

  • Bolt is machined from high-strength superalloy, more than 50% stronger than traditional MSR bolt materials, and engineered with tapered lugs to support the large case head of .450 Bushmaster ammunition.

  • The Ruger® Elite 452™ AR-Trigger is a two-stage trigger that offers a smooth, crisp, 4.5 pound trigger pull. It features a full-strength hammer spring for consistent primer ignition and a lightweight hammer that enables a 30% faster lock time over standard MSR triggers.

  • Carbine-length gas system provides the most reliable function with .450 Bushmaster ammunition.

  • Magpul® M-LOK® accessory attachment slots along the 3:00, 6:00 and 9:00 positions with additional slots on the angled faces near the muzzle.

  • Cold hammer-forged 4140 chrome-moly steel barrel with ultra-precise 5R rifling and black nitrided finish provides exceptional accuracy, longevity and easy cleaning. The 1:16″ twist rate maximizes accuracy with bullets ranging from 170 to 260 grains.

  • Chrome-plated bolt carrier inside diameter and chrome-plated gas key inside diameter provide exceptional resistance to hot gases. The gas key is staked so that it will not loosen after extensive firing.

  • Ruger® muzzle brake is a radial port design that significantly reduces felt recoil and muzzle movement. The 11/16″-24 threaded barrel allows for standard muzzle accessories to be installed.

  • Also includes: One, 5-round metal box magazine.

  • Stock Black Synthetic, Collapsible
  • Handguard Free-Float M-LOK®
  • Sights None
  • Barrel Length 18.63″
  • Thread Pattern 11/16″-24
  • Twist 1:16″ RH
  • Capacity 5
  • Finish Type III Hard Coat Anodized
  • Height 7.30″
  • Weight 7.4 lb.
  • Overall Length 35.60″38.90″
  • Length of Pull 11.10″14.40″
  • Grooves 5
  • Suggested Retail $1099.00