The F90 LE (Law Enforcement) has been designed against rigorous requirements for reliability, adaptability and accuracy. It is the semi-automatic version of the F90 rifle currently in-service with the Australian Defence Force, for use by law-enforcement agencies and for self-defence. The F90 LE has been qualified to NATO and UK MoD military test standards, and is available in three intechangeable standard barrel lengths. The F90 LE uses MIL-STD Picatinny accessory rails to accommodate a wide range of customer preferred accessories and target-acquisition systems. The F90 LE is semi-automatic in 5.56mm x 45mm calibre.