New NATO spec 5.56 M-193 with Lake City Brass! Lake City is known for supplying our troops with top quality ammo, providing Mil-Spec components, including top quality brass cases. 5.56 M-193 55 gr FMJ is designed for your military style AR-15, and a great round for fine tuning your marksman skills with target practice. This ammunition is for use only for chambers marked 5.56 NATO, as are most AR-15 carbines and rifles.
Mil-Spec is an abbreviated term that stands for "military specification." Every aspect of a final cartridge has to meet criteria defined by the military to often include dimensions, materials, testing of parts, etc. A Mil-Spec part is ultimately approved by a U.S. government inspector. Lake City ammunition and components meets this criteria.