The Multi-Function Rail Launcher (MFRL) is part of the Armament Carriage and Installation System (ACIS) of the Eurofighter. The MFRL is designed to carry and launch the missiles throughout all flight attitudes and environmental conditions. AIM9-L, ASRAAM, AMRAAM and IRIS-T in analogue mode can be released from the MFRL. Therefore, it is the only rail system worldwide supporting four different kinds of missiles.
The MFRL consists primary of an Electronic Unit to handle all electrical signals between the aircraft and the missiles, the HiPPAG to provide the necessary cooling air for optical missiles (AIM9-L, IRIS-T ) and the FWD-Detent Unit which task is to restrain or release the missile if the trigger sequence is correct.