5.56x45mm NATO rifle ammunition for sale, The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO) is an intermediate cartridge developed in the United States and originally chambered in the M16 rifle. Under STANAG 4172, it is a standard cartridge for NATO forces as well as many non-NATO countries. It is derived from, but is not identical to, the .223 Remington cartridge.
Today’s short barrel rifles excel in close-quarter encounters but sometimes lack the velocities and terminal ballistics that longer barrels have. To address these concerns, Maxim Defense partnered with Fort Scott Munitions to optimize ammunition loads specifically for SBR