Ruger AR-556 MPR | .450 Bushmaster | 5rd | MFG# 8522

The Ruger AR-556 MPR is a modern sporting rifle chambered in .450 Bushmaster configured with Magpul furniture and a free-floating M-LOK handguard for accessory flexibility. It features a Ruger Elite 452 two-stage trigger and a bolt engineered to support the large .450 Bushmaster case head. The rifle ships with one 5-round metal magazine and does not include iron sights. For a practical optic under $1,000 that pairs well with short- to mid-range hunting or brush work, consider a low-power variable optic such as the Vortex Strike Eagle 1-8×24.

Product Specifications

• The UPC is 736676085224.
• The model is AR-556 MPR.
• The caliber is .450 Bushmaster.
• The action is Semi-Automatic.
• The capacity is 5 rounds.
• The finish is Type III hard coat anodized (matte black).
• The weight is 7.4 lb.
• The overall length is 35.60 – 38.90 inches.
• The rate of twist is 1:16″ RH.
• The handguard is a 15″ free-float M-LOK design.
• The stock is a Magpul MOE SL collapsible black synthetic unit.
• The muzzle device is a Ruger radial port muzzle brake with 11/16-24 thread.
• The trigger is a Ruger Elite 452 two-stage with a 4.5 lb pull.
• The barrel is described as cold hammer-forged 4140 chrome-moly steel with ultra-precise 5R rifling and black nitrided finish.
• The upper receiver material is 7075-T6 aerospace-grade aluminum, Type III hard coat anodized.

This AR-556 MPR is built to support large-case .450 Bushmaster ammunition while offering modern ergonomics and accessory options. The combination of Magpul furniture, a free-floating M-LOK handguard and a two-stage trigger gives a balanced platform for hunting in thick cover and other short- to mid-range field applications. Its durable finishes and component choices reflect an emphasis on longevity and reliable function in working conditions.