The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO, commonly pronounced "five-five-six") is a rimless bottlenecked centerfire intermediate cartridge family developed in the late 1970s in …

Oct 30, 2025 · 556 ammo, officially known as 5.56x45mm NATO, is a rifle cartridge developed in the late 20th century for military and civilian use. It is the standard round for the AR-15 and M16 platforms, …

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.

5.56mm cartridges are ideal for target shooting, home defense, and varmint hunting. Their lightweight design allows for quick follow-up shots and mild recoil, making them accessible for all skill levels.

Oct 23, 2025 · 223 vs 556: What’s the Difference? The cartridge cases of the 223 Rem and 5.56 NATO appear identical on the outside, but 556 cases can have minutely thicker case walls.

Jun 29, 2025 · The 556 x 45mm NATO round is referred to as 556 ammunition and is incendiary for rifles used in combat. The speed, price, accuracy and low recoil of the cartridges make them very popular …

Shop 5.56 ammo for sale at Sportsman’s Outdoor Superstore. 5.56 NATO was developed to replace the 7.62x51mm NATO cartridge, which had been in service since 1954. Servicemen found that the recoil …

Freedom Munitions manufactures affordable reloaded and new 5.56 ammunition suitable for the range, hunting, competition, or self-defense.

Renowned for accuracy, reliability, and consistent performance, our carefully curated range of 5.56 Ammo features industry-leading brands such as Armscor and Winchester.

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