5.56 AR15 rifles for sale online or in-store at Sportsman's Warehouse. Shop a full selection of 5.56 caliber AR15 rifles from top firearms manufacturers.

The 5.56mm Nato is a mid-sized rimless bottlenecked cartridge named for its use as the second standard service rifle cartridge for NATO forces in the 1980s. It was originally intended for the M16 and is often used in the AR-15, though it can also be used in many rifles from several of the top manufacturers in the business.

Affordable, American-made Modern Sporting Rifle with the rugged reliability that you have come to expect from Ruger.

Get an AR-15 rifle that's optics-ready to attach a scope and has a longer barrel for increased bullet velocity. And if you just want something that looks cool at the range, our AR-15s for sale feature everything from tactical black to patriotic decals. Explore all of these and more in our massive collection of guns for sale!

The Ruger AR-556 is a semi-automatic modern sporting rifle with a milled gas block, a telescoping M4-style buttstock and ergonomic pistol grip with extended trigger reach.

The Ruger AR-556 is a highly reliable and versatile AR-style rifle designed for both novice and experienced shooters. It features the Ruger Rapid Deploy folding rear sight, offering windage adjustability, paired with an A2-style, F-height front sight that is elevation adjustable, providing a dependable aiming system.

America’s favorite cartridge, the 5.56 offers a wide range of loadings, proven performance, and a host of capable Springfield Armory firearms to fire them. Whether you want a rifle or a pistol, there’s a Springfield Armory firearm chambered for this round that’s ready for you.

Browse our 223 Remington 5.56 Nato Rifles on BudsGunShop.com. We offer the largest selection of Rifles and our everyday low prices making shopping easy.

Get a new 5.56 NATO AR 15 Rifle at Primary Arms at the best prices with the best customer service in the industry. We've got all your favorite AR15 rifle brands.

Click here to shop a wide selection of 5.56 Rifles at MidwayUSA. We carry all your favorite brands like Ruger, Kel-Tec, Sig Sauer, and more!