Ruger AR-556 MPR
Sturm, Ruger & Company · Rifle · In Production · 2017
Also known as: AR-556 Multi-Purpose Rifle
Overview
The Ruger AR-556 MPR (Multi-Purpose Rifle) is a flat-top AR-15-pattern semi-automatic rifle built around an 18-inch cold-hammer-forged 4140 chrome-moly barrel with 5R rifling and a rifle-length gas system. It pairs Ruger's free-float 15-inch M-LOK handguard, the Ruger Elite 452 AR-Trigger, Magpul furniture and a Ruger muzzle brake for smoother, lower-recoil operation than a standard carbine.
Specifications
| Weight (empty) | 3060 g (107.9 oz) |
| Overall Length | 921 mm (36.26") |
| Barrel Length | 457 mm (17.99") |
| Action Type | Gas Operated |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 945 m/s (3100 fps) |
| Effective Range | 500 m (547 yd) |
| Barrel Rifling | Right Hand |
| Rifling Twist | 203 mm (7.99") |
| Number of Grooves | 5 |
| Frame Material | Aluminum |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Black Anodized |
Calibers
- 5.56x45mm NATO · primary · 5.56x45mm NATO — also known as .223 Remington, 5.56 NATO
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety
- Features: Free Float Handguard, M Lok Handguard, Muzzle Brake, Adjustable Stock, Accessory Rail, Cold Hammer Forged Barrel
Production
Production years: 2017-present
Origin
Country of origin: United States
Notes
The rifle-length gas system on an 18-inch barrel is uncommon and contributes to softer recoil and reliable cycling. Salt-bath nitrided barrel for corrosion resistance.