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

  • Item Number: 8522
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  • View More Items by Ruger
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  • Condition: NEW
AR-556 MPR 450 BUSHMASTER
$999.99 $1,269.00

In Stock with FREE shipping
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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

Write a review
(5 out of 5) Gun addiction.
by from Omaha, NE on

Really great service and quality .

(5 out of 5) BIG PUNCH
by from West Olive, MI on

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) The best deer and pig gun for Michigan
by from Holly, MI on

This is the greatest gun since the muzzleloader. It has absolutely scary results on Deer and Pigs. I have shot a 200 lb pig and several deer with mine and the results are devastating. The pig was shot in the ear, quarrying toward me at 50 yards. The bullet entered the right ear and lodged the left shoulder. Completely destroying the ham. The deer was running away and I hit her in the rear 1/2 inch to the left of the rectum. It traveled into the spinal column and dropped it where it was at the time, 94 yards away. The second one was hit in the neck at 159 yards. they were both running at a medium speed and were killed immediately, the most humanly death that I have seen they never even fidgeted after being hit.
My son borrowed my Gun and killed a deer at 178 yard with a hold on sight pitcher. He reported the same description of what happened after the bullet hit. We did not have to do a blood line search. I will be using my gun exclusivity for deer and pig hunting. I am apposed to long range killing of any animals, I want only as close to instant death as I can find. I will pass up any shot that I don't feel is going to be instant death.