Medium contour 16.10” cold hammer forged barrel with 1:8 twist

Aerospace-grade 7075-T6 forged aluminum receiver

Type III hard coat anodized receiver

Ruger Rapid Deploy folding rear sight

M4 style six position telescoping buttstock

Patent pending barrel nut and delta ring for easy handguard removal

Handguard uses standard Mil-Spec barrel nut wrench

9310 alloy steel machined bolt

Chrome-plated internal diameter carrier and gas key

Includes A2 front sight tool

Includes one 30-round Magpul PMAG magazine

Ruger has been designing and building high quality semi-automatic rifles for many years and with the rise in popularity of the AR-15 rifle system, they had to get in on the action. So, they released an affordable entry-level rifle called the AR-556. Chambered in 5.56 NATO, this semi-automatic rifle comes with all the standard features that you will find on comparatively priced rifles, but with the benefit of Ruger quality control. It comes with a Ruger Rapid Deploy folding rear sight in addition to the A2 style fixed front sight that offers plenty of windage and elevation adjustment to dial in your rifle. The rear sight can be folded down to make room for an optic on the 1913 picatinny rail flat top receiver and gives you the option to co-witness with red dot sights. The receiver is forged from aerospace-grade 7075-T6 aluminum and is Type III hard coat anodized for maximum corrosion resistance and durability. The rear of the receiver features a carbine length Mil-Spec buffer tube and a six-position M4 style telescoping stock so you can easily adjust the length of pull for different shooters. The Ruger AR-556 is a high quality, affordable modern sporting rifle perfect for anyone looking to get into the sport.The carbine length stock works perfectly with the carbine length gas system that finds the perfect balance between reliability and recoil reduction. The milled gas block includes sling mounting options, a bayonet lug, and is attached to a 16.10” medium contour cold hammer-forged barrel with 1:8” twist. This twist rate, like the rest of the rifle, is the best-balanced option meaning that it can effectively stabilize bullets from 35 to 77 grains. The 5.56 NATO chamber is capable of firing both 5.56 NATO and .223 Remington ammunition and features M4 feed ramps to reliably feed all types of bullet shapes. The end of the barrel sports a Ruger flash suppressor that is attached by 1/2x28” threads for compatibility with most muzzle devices. Protecting the barrel, gas tube, and your hand is a heat-resistant glass-filled nylon M4 style handguard that is attached by a barrel nut and delta ring.The heart of the rifle is the matte black oxide finished bolt carrier group with chrome plated inner diameter gas key that can withstand hot gases and prolong the life of the rifle. The gas key is properly staked to prevent it from being knocked loose; a common problem with low end rifles. The bolt is machined from 9310 alloy steel and is shot peened and pressure teste to ensure strength and reliability. The bcg is functioned by a single-stage Mil-Spec trigger that provides durable and reliable fire control while holding on to the ergonomic pistol grip with enlarged trigger guard.Sturm, Ruger & Co., Inc. has been one of the nation's leading manufacturers of dependable rifles, shotguns, and pistols since 1949. As a full-line manufacturer of American-made firearms, Ruger offers consumers over 400 variations of more than 40 product lines to ensure that you find exactly what you are looking for. Ruger has been a model of corporate and community responsibility for more than 60 years and live by the motto, “Arms makers for responsible citizens.”