Today's law enforcement officers need ammunition specifically designed for use in semi-automatic rifles or "urban rifles," such as variants of the M-16 or AR-15. Federal TRU (Tactical Rifle Urban) ammunition is engineered using Mil-quality specifications for ideal functioning in these firearms. Each TRU cartridge is made using select mil-quality low flash powders and the case features thicker brass for added strength. TRU primers are crimped in .223 offerings for added holding ability, virtually eliminating backed out primers that can lock-up and render the rifle useless. TRU bullets are specifically engineered, ranging from fragmenting designs for tactical entry to deeper penetrating bullets for patrol.