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

weapons of war
weapons of war

A Deadly Testing Ground: Guns of the Spanish Civil War

Great powers have often used smaller conflicts as test beds for new weapon systems, and also as dumping grounds for obsolete machinery. The Spanish Civil War was one such conflict.

Sequel: The New Taurus Judge

Not content to merely mark the gun's 20th anniversary with a special engraved edition, Taurus also introduced the New Taurus Judge this year.

The Armed Citizen® Aug. 3, 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.

Questions & Answers: A Wreck of a Remington 40-X

An American Rifleman reader writes in about a project Remington 40-X .22 target rifle that needs some serious help.

New for 2026: KJI K950 Tripod and Titan Inverted Ball Head

KJI (formerly Kopfjäger) releases the carbon-fiber K950 tripod and Titan inverted-ball head.

Book Review | Guns, Shooting and Hunting: What I’ve Learned in 60 Years

Much of what one learns is truly inexpressible to others—so it’s a wonderful rarity when someone can put their knowledge into words.

Interests



Get the best of American Rifleman delivered to your inbox.