Ruger AR-556 MPR Rifle Now in .450 Bushmaster

by
posted on September 26, 2018
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
ruger_556_8522-1.jpg

Ruger has announced the new AR-556 Multi-Purpose Rifle (MPR) chambered in .450 Bushmaster, offering an ideal hunting platform for midwestern whitetail deer, sizeable pigs, and target shooting at heavy steel.



The MPR platform’s superior accuracy, versatility and shootability can be attributed to many features, including a Ruger muzzle brake, Elite 452 two-stage trigger, free-float handguard with Magpul M-LOK accessory attachment slots and Magpul furniture.

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.

The rifle ships with a 5-round metal box magazine.


For more information on the AR-556 MPR or to learn more about the extensive line of award-winning Ruger firearms, visit Ruger.com  To find accessories for the AR-556 MPR and other Ruger firearms, visit ShopRuger.com or your local independent retailer of Ruger firearms.

Additional Reading:
The Keefe Report: Ruger's Multi-Purpose Rifle   

Latest

Ruger Harrier
Ruger Harrier

Review: Ruger Harrier

Ruger’s new Harrier AR-15-style rifle proves to be a great entry-level, multi-purpose carbine.

New For 2026: Canik Mete MC9 Prime Radian

Building on the company's initial Mete MC9 Prime design, Canik added a Radian Weapons Afterburner compensator and Ramjet barrel to create the new MC9 Prime Radian.

The Armed Citizen® April 6, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Does AI Pose a Threat to the 2nd Amendment?

Several recent studies highlighted AI's propensity to dispense anti-Second Amendment propaganda, and more alarmingly, AI also seems willing to sacrifice human lives to avoid being taken offline.

I Have This Old Gun: Winchester 1886 Saddle-Ring Carbine

As our country was celebrating its centennial 150 years ago, Oliver Winchester dominated the lever-action market with his Models 1866 and 1873 and was just introducing the Model 1876.

First Look: Gunsmoke Arsenal Tactical Cigar Protection

Looking for a smoke after smoking some targets? The Tactical Cigar Protection case from Gunsmoke Arsenal keeps your stogie secured until you're ready to relax.

Interests



Get the best of American Rifleman delivered to your inbox.