Ruger AR‑556 M4 — 5.56 NATO Modern Sporting Rifle

The Ruger AR‑556 is an American‑made, M4‑style modern sporting rifle built for reliability, customization, and real‑world performance. Ruger engineered the AR‑556 to offer a durable platform at a competitive price—combining aerospace‑grade forgings, a cold hammer‑forged barrel, and full compatibility with standard AR/M4 components so you can easily accessorize and personalize your build.

Key Selling Points

• Carbine‑length M4 configuration for familiar handling and accessory compatibility.

• Forged 7075‑T6 aluminum receivers (upper & lower) with Type III hard‑coat anodize for long life and corrosion resistance.

• Cold hammer‑forged 16.10″ 4140 chrome‑moly steel barrel with 1:8 twist (stabilizes 35–77 gr bullets) and M4 feed ramp cuts for reliability.

• Ruger Rapid Deploy folding rear sight (windage adjustable) paired with an elevation‑adjustable front sight for co‑witnessing optics.

• Mil‑spec BCG features: 9310 alloy steel bolt (shot‑peened, proof tested), chrome‑plated carrier ID and gas key ID, and staked gas key.

• User‑friendly ergonomics: improved trigger‑reach grip, enlarged trigger guard for gloved use, and six‑position telescoping stock.

• One‑person handguard removal via patent‑pending barrel nut / delta ring design (accepts standard carbine‑length handguards).

• Includes one 30‑round Magpul PMag and Ruger flash suppressor; ½‑28 threaded muzzle for accessories.

Features & Benefits

• Durable construction: Forged receivers and hard‑coat anodize mean long service life under heavy use.

• Accuracy & longevity: Cold hammer‑forged rifling improves barrel life and consistent shot placement.

• Customization ready: Uses standardized AR components—handguards, optics, triggers, stocks, etc.

• Reliable operation: M4 feed ramps, solid gas system, and quality bolt/BCG treatments improve function under adverse conditions.

• Enhanced ergonomics: Thoughtful controls and geometry for fast, natural handling and comfortable shooting sessions.

Technical Specifications

• Manufacturer: Ruger

• Model: AR‑556 (Model 8500)

• Caliber: 5.56 NATO (chamber accepts .223 Rem.)

• Barrel Length: 16.10 in. medium contour, cold hammer‑forged 4140 chrome‑moly steel

• Twist Rate: 1:8 (stabilizes 35–77 gr bullets)

• Overall Length: 32.25 – 35.50 in.

• Weight: 6.50 lbs.

• Capacity: 30‑round (1× Magpul PMag included)

• Receiver Material: Forged 7075‑T6 aluminum, Type III hard‑coat anodized

• Bolt: 9310 alloy steel, shot‑peened, proof tested

• Bolt Carrier: Chrome‑plated IDs, staked gas key, matte black oxide finish

• Sights: Ruger Rapid Deploy folding rear (windage adj.) + elevation adjustable front (A‑2 F‑height)

• Handguard: Heat‑resistant, glass‑filled nylon (accepts standard carbine handguards via patent‑pending nut)

• Stock: Six‑position telescoping (mil‑spec buffer tube)

• ** muzzle:** ½‑28 threaded with Ruger flash suppressor

• Special: M4 feed ramp cuts, forward assist, dust cover, brass deflector, enlarged trigger guard

Who Should Buy This Rifle?

• Shooters who want a ready‑to‑use, reliable AR platform with quality factory components.

• Owners who plan to customize — add optics, aftermarket handguards, triggers, or muzzle devices.

• Hunters, competitors, and home‑defense users who value durability and parts commonality with the AR ecosystem.

Quick Care Tips

• Run a proper break‑in and cleaning schedule for the cold hammer‑forged barrel to preserve accuracy.

• Use high‑quality magazines (Magpul included) and premium 5.56 NATO/.223 ammunition.

• Verify local laws and follow safe storage and handling practices.