Ruger AR-556 MPR Collapsible Stock 5.56 NATO 18 10-Round Rifle

Ruger AR-556 MPR Collapsible Stock 5.56 NATO 18" 10-Round Rifle

The AR-556® MPR features the Ruger® Elite 452® AR-Trigger. This two-stage trigger 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 faster lock time for improved accuracy.

This model ships with a 10-round magazine for consumers in those states which limit magazine capacity.

  • Black synthetic collapsible stock
  • Lower receiver fitted with Magpul® MOE® grip and MOE SL® collapsible buttstock on mil-spec buffer tube
  • Handguard free-floated for accuracy and slim, 15" length provides enhanced ergonomics
  • Mil-spec 9310 bolt;machined and shot peened for strength and durability
  • Magpul® M-LOK® accessory attachment slots along the 3:00, 6:00 and 9:00 positions with additional slots on angled faces near muzzle
  • Ruger muzzle brake with radial port design significantly reduces felt recoil and muzzle movement
  • Threaded barrel allows for standard muzzle accessories to be installed
  • Cold hammer-forged 4140 chrome-moly steel barrel with ultra-precise rifling 
  • 1:8" twist stabilizes bullets from 35 to 77 grains
  • 5.56 NATO chamber allows use of both 5.56 NATO and 223 Rem ammo
  • M4 feed ramps provide improved reliability
  • Matte black nitrided finish provides corrosion-resistance
  • Aerospace-grade 7075-T6 aluminum forging; flat top upper receiver includes forward assist, dust cover and brass deflector; Type III hard-coat anodized
  • Chrome-plated bolt carrier and gas key; gas key is staked so that it will not loosen after extensive firing
  • Rifle-length gas system provides smoother operation and reduces felt recoil
  • Capacity: 10
  • Twist: 1:8" RH
  • Grooves: 5
  • Length of pull: 11.1 - 14.4"
  • Dimensions: 35 - 38.25"L x 8"H
  • Weight: 6 lbs. 13 oz.
  • Made in USA
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When Sturm, Ruger® & Co., Inc. opened for business in 1949 with a meager $50,000 investment, the company faced serious doubts from industry insiders.

But this fledgling company was guided by several well-thought-out concepts, not the least of which was founder William B. Ruger's intent to build each product "to a standard so I would want one even if it was made by our competitors." This fundamental concept, this deceptively simple touchstone of the underlying principles of innovation, quality and value, has proved so compelling that over 60 years later there is no question which company is preeminent in the American firearms industry. Ruger's rise to its present well-earned position has made it a respected company on the New York Stock Exchange since 1990.
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Product Details

Ruger AR-556 MPR Collapsible Stock 5.56 NATO 18" 10-Round Rifle

SKU #:
UPC #:
Action design:
5.56 NATO
Magazine type / Capacity:
Metal finish / Material:
Matte black
Overall length:
6 lbs. 13 oz.
Semi-automatic 18" 5.56 NATO $879.99