The 5.56×45 mm bullet can be shot from any standard NATO round-firing rifle, such as the AR-15, SIG MCX, among others. The ...
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. ** Sturm, Ruger & Co., Inc. has ...
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. ** If you are new to the AR scene, ...
Opinion
Forgotten Weapons on MSNOpinion

How .223 and 5.56 Became the Most Confused Cartridges Ever

For most shooters the difference between .223 Remington and 5.56×45 NATO is minor, but it matters because 5.56 is typically loaded to higher pressures and uses a slightly different chamber leade.