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.
- 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.
- 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.
Bushmaster Semi-Automatic Rifle
- 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.
- 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