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Ruger AR-556 M4 Style Rifle

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The Ruger AR-556  semi-automatic, M4-style, direct impingement Modern Sporting Rifle  offers consumers an affordable, American-made Modern Sporting Rifle with  the rugged reliability they have come to expect from Ruger. Extensively  tested during its development, the AR-556 is constructed from  top-quality components, including forged 7075-T6 aluminum upper and  lower receivers and a cold hammer-forged chrome-moly steel barrel with  M4 feed ramp cuts.

Chambered in 5.56 NATO, the AR-556’s carbine-length, flat-top, M4  design is fully configured with a Ruger Rapid Deploy folding rear sight,  milled F-height gas block with post front sight, forward assist, dust  cover, brass deflector, telescoping six-position stock, improved  trigger-reach grip, enlarged trigger guard and one 30-round Magpul PMag.  Standardized M4/AR components are utilized throughout, so the AR-556  can be customized easily.

AR-556 Features

Windage Adjustable Ruger Rapid Deploy Rear Sight: The Ruger  Rapid Deploy folding rear sight provides windage adjustability, and is a  solid, reliable aiming system when coupled with the elevation  adjustable front sight. The rear sight can be folded out of the way to  make room for optics but can be instantly redeployed if needed.
Forged 7075-T6 Aluminum Upper Receiver: Made from aerospace-grade  7075-T6 aluminum forging, the flattop upper receiver includes a forward  assist, dust cover and brass deflector, and is Type III hard coat  anodized for maximum durability.
Shot Peened, 9310 Alloy Steel Bolt: The bolt is machined from  9310 alloy steel and is shot peened and pressure (proof) tested to  ensure strength, structural integrity and durability.
Patent Pending Barrel Nut and Delta Ring: The patent pending  Barrel Nut and Delta Ring are designed for one person handguard removal  and installation. The design accepts standard carbine length handguards.  The barrel nut uses a standard wrench and can be swapped with a  Mil-Spec barrel nut if desired.
Elevation Adjustable Front Sight: The front sight post is  elevation adjustable, and a front sight tool is included. The A-2 Style  F-Height allows co-witness with many optics.
Medium Contour Cold Hammer-Forged Barrel: The 16.10 inch medium  contour barrel is cold hammer-forged providing ultra-precise rifling for  exceptional accuracy, longevity and easy cleaning. The 1:8 twist rate  stabilizes bullets from 35 to 77 grains, and the 5.56 NATO chamber  allows the use of both 5.56 NATO and .223 Rem. ammunition. M4 feed ramps  provide improved operational reliability, and the matte black oxide  finish reduces glare and provides corrosion resistance. A Ruger flash  suppressor is provided, and the 1/2-28 threaded barrel allows for  standard muzzle accessories to be installed.
Single Stage Trigger and Enlarged Trigger Guard: The single stage  trigger provides durable and reliable fire control. The enlarged  trigger guard is designed to allow for gloved shooting.
Matte Black Oxide Bolt Carrier with Staked Gas Key: The  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. A matte  black oxide finish on the exterior of the bolt carrier provides  corrosion resistance.
Serrated Face Milled Gas Block: The milled gas block is located  at a carbine length (M4) position for improved balance and handling.  Multiple attachment points include a QD socket and bayonet lug, for many  sling and accessory mounting options. Serrations on the angled face of  the gas block provide a low-glare surface.

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