Ruger AR-556 MPR 450 Bushmaster Semi-Automatic Multi-Purpose Rifle

  • Item Number: 8522
  • /
  • View More Items by Ruger
  • /
  • Condition: NEW
Ruger AR-556 MPR 450 Bushmaster Semi-Automatic Multi-Purpose Rifle
$1,019.99 $1,309.00

Temporarily Out of Stock

Includes FREE shipping
  • ONE HORSE OH-15 5.56 15` RAIL M-LOK

    One Horse OH-15 5.56 NATO Semi-Automatic Rifle with 16 Inch Socom Barrel and M-LOK Handguard
    $549.99 $439.99

  • COLT AR15A4 5.56MM SEMI-AUTOMATIC RIFLE

    Colt AR15A4 5.56mm Semi-Automatic Rifle
    $1,399.00 $1,169.99

  • SPRINGFIELD SAINT EDGE 5.56 EVAC PISTOL 7.5` BBL

    Springfield Saint Edge EVAC 5.56mm AR-Pistol with 7.5 in Barrel
    $1,949.00 $1,759.99

  • SPRINGFIELD SAINT 5.56MM VICTOR VS 16` OPTIC 4XMAGS, BAG

    Springfield Saint Victor 5.56 NATO Gear Pac with Viridian Venta Green Dot, Four Mags and Rifle Bag
    $1,368.00 $1,099.99

  • NEXGEN NG15 223 WYLDE RIFLE GREEN NITRIDE

    NexGen Arms NG15 223 Wylde Semi-Auto Rifle with OD Green Finish
    $449.99

  • NEXGEN NG15 223 WYLDE RIFLE PEWTER NITRIDE

    NexGen Arms NG15 223 Wylde Semi-Auto Rifle with Pewter Nitride Finish
    $449.99

  • NEXGEN NG15 223 WYLDE RIFLE BRONZE NITRIDE

    NexGen Arms AR-15 223 Wylde Semi-Auto Rifle with Bronze Nitride Finish
    $449.99

  • NEXGEN NG15 223 WYLDE RIFLE BLACK NITRIDE

    NexGen Arms NG15 223 Wylde Semi-Auto Rifle Black Nitride Finish
    $449.99

  • NEXGEN NG15 300 BLACKOUT 16` PWT

    NexGen Arms NG-15 300 Blackout Semi-Auto Rifle with Pewter Cerakote Finish
    $534.00 $499.99

  • BEAR CREEK ARSENAL BC-15 16` 300 BLKOUT 30RD BLK

    Bear Creek Arsenal BC-15 .300 Blackout AR-15 Semi-Auto Rifle
    $424.99 $419.99

  • SIG SAUER 516 G3 5.56 NATO 30+1 16` BLACK THREADED BARREL, BRONZE CERAKOTE ALUMINUM RECEIV

    Sig Sauer 516 G3 5.56 NATO Semi-Auto Rifle with Bronze Signature Finish
    $2,299.99 $2,099.99

  • NEXGEN NG15 300 BLACKOUT 7.5` GRN

    NexGen Arms NG-15 300 Blackout Semi-Auto Pistol with Green Cerakote Finish
    $510.00 $499.99

  • Federal 450 Bushmaster 300 gr Jacketed Hollow Point Power-Shok 20/Box

    Federal 450 Bushmaster 300 gr Jacketed Hollow Point Power-Shok 20/Box
    $68.99 $34.99
    ($1.75 / round)

  • Hornady 450 Bushmaster 250 gr Custom FTX 20/Box

    Hornady 450 Bushmaster 250 gr Custom FTX 20/Box
    $30.99
    ($1.55 / round)

  • Hornady 450 Bushmaster 395 GR Sub-X Subsonic 20/Box

    Hornady 450 Bushmaster 395 GR Sub-X Subsonic 20/Box
    $33.99
    ($1.70 / round)

  • Federal 450 Bushmaster 300 gr Jacketed Hollow Point Non-Typical 20/Box

    Federal 450 Bushmaster 300 gr Jacketed Hollow Point Non-Typical 20/Box
    $51.99 $34.99
    ($1.75 / round)

  • Hornady 450 Bushmaster 245 gr Interlock American Whitetail 20/Box

    Hornady 450 Bushmaster 245 gr Interlock American Whitetail 20/Box
    $27.99
    ($1.40 / round)

  • Winchester 450 Bushmaster 260 gr Power Point Super X 20/Box

    Winchester 450 Bushmaster 260 gr Power Point Super X 20/Box
    $41.51
    ($2.08 / round)

  • AMEND2 MOD 2 AR-15 5.56 MM 30 RD BLACK MAG

    Amend2 AR15/M4 Mod.2 5.56 NATO 30 Round Magazine (Black)
    $14.99 $6.97

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD MAG

    Magpul PMAG GEN M3 5.56 NATO 30 Round Black Magazine
    $14.95 $11.99

  • MAGPUL PMAG 30 GEN M2 AR-15 556 NATO 30 RD MAG

    Magpul PMAG GEN M2 5.56 NATO 30 Round Black Magazine
    $12.95 $9.94

  • MAGPUL PMAG 20 GEN M3 AR-15 556 NATO 20 RD MAG

    Magpul PMAG GEN M3 5.56 NATO 20 Round Black Magazine
    $14.95 $10.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD MAG (TAN)

    Magpul PMAG GEN M3 5.56 NATO 30 Round Coyote Tan Magazine
    $14.95 $12.11

  • ATI SCHMEISSER S60 223/5.56MM 60-ROUND AR-15 MAGAZINE WITH WINDOW (GEN2)

    American Tactical Schmeisser S60 5.56 NATO 60 Round AR-15 Magazine with Window (Gen2)
    $84.95 $24.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD WINDOW MAG

    Magpul PMAG GEN M3 5.56 NATO 30 Round Black Magazine with Window
    $17.95 $14.52

  • AMEND2 AR-15 5.56/.223 MOD-A BLACK 30 ROUND M81 CAMO

    Amend2 AR 15 5.56/223 MOD A 30 Round Camo Magazine
    $11.07

  • AMEND2 AR-15 5.56/.223 MOD-A BLACK 30 ROUND SILENT LIBERTY

    Amend2 AR 15 5.5mm /223 Remington 30 Round Silent Liberty Magazine
    $11.07

  • AMEND2 AR-15 300 AAC BLACKOUT 30-ROUND MOD-3 MAGAZINE

    Amend2 AR-15 Mod-3 300 AAC Blackout 30 Round Magazine
    $15.99 $9.62

  • AMEND2 AMEND2 AR-15 5.56/223 30ROUND SPRINKLE DONUT PATTERN MOD-2

    Amend2 AR-15 5.56 NATO 30 Round Sprinkle Donut Mod.2 Magazine
    $24.99 $15.73

  • MAGPUL PMAG GEN M3 WINDOW 30RND 5.56X45MM/223REM OD GREEN POLYMER

    Magpul PMAG Gen M3 AR/M4 5.56/223 30 Round Window Magazine - OD Green
    $17.95 $14.52

Product Description

What's in the Box

  • Ruger AR-556 MPR 450 Bushmaster Multi-Purpose Rifle
  • (1) Magazine
  • Cable Lock
  • Owner's Manual

Introducing the new Ruger AR-556® Multi-Purpose Rifle ("MPR") chambered in .450 Bushmaster. This new offering is ideal for hunting Midwestern whitetail deer and big pigs and target shooting at heavy steel.

The MPR platform offers superior accuracy, versatility and shootability by incorporating a Ruger® muzzle brake, Elite 452™ two-stage trigger, free-float handguard with Magpul® M-LOK® accessory attachment slots and Magpul furniture. This new rifle combines innovative engineering, modern materials and precision CNC-machining to make a superior rugged, reliable, semi-auto rifle chambered for the .450 Bushmaster cartridge.

Accuracy and velocity are maximized with a nitrided, 18-5/8" cold hammer-forged barrel and the 11/16"-24 radial port muzzle brake to soften recoil. A carbine-length gas system with 0.875" gas block ensures reliable function and fits under the 15" free-float handguard. The Magpul M-LOK accessory attachment slots around the handguard make attaching a sling and bipod easy. The handguard's smooth profile situates easily on shooting sticks or a backpack for a steady shot.

Engineered with a high-strength superalloy bolt and tapered lug geometry, the .450 Bushmaster MPR is built to withstand the strength of a cartridge that delivers twice the energy of 5.56 NATO. The upper receiver features a large window for easy ejection and is covered by a standard dust cover. Mil-Spec forgings are CNC-machined, anodized and finished with Ruger's Elite 452 two-stage trigger, Magpul MOE grip and MOE SL® stock.

Firearm Features

  • 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.

Firearm Specifications

  • Model Number: 8522
  • Caliber: 450 Bushmaster
  • 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

Customer Comments & Questions

Customer Reviews

(5 out of 5) BIG PUNCH
by Drew from West Olive, MI on July 24, 2020

This gun is amazing. Bought this so I could blast a deer south of The line. Accurate AF and has a little kick. LOL

(5 out of 5) Gun addiction.
by Jian from Omaha, NE on August 19, 2020

Really great service and quality .

(5 out of 5) Really does the job
by Bill from McMurray, PA on August 3, 2024

After a few initial issues that Ruger quickly corrected, this rifle has performed flawlessly and effectively. My son shot a 500-pound-plus hog from approximately 60 yards, hitting it in the face. Needless to say, it never knew what hit it.