As with all the other units that served in Vietnam, the personnel of the 199th LIB were armed with the standard issue of weapons and equipment.  Although some of the early Redcatchers may have carried the M-14 rifle into battle on occasion, the vast majority of soldiers were issued the M-16A1 rifle.  Despite a rocky start, the weapon proved to be fairly accurate and reliable in the hands of a competent and responsible soldier.