The CGUE DEEP Arms (DEEP standing for Directional Energy Emission exPerimental) is a mobile suit based on the ZGMF-515 CGUE. It is created to test the beam weapon technology that ZAFT obtained from the four stolen G Project mobile suits, and is thus equipped with a pair of experimental beam cannons that are over 10 meters in length. The cannons' large size is due to the presence of a large beam-generating unit and large cooling systems. These cannons also placed an additional burden on the suit's body. To cope with it, existing power and cooling units are replaced by newer, high-output ones, and additional units are installed in the backpack.
Although the beam cannons' cooling issue is not adequately solved, their performance reached acceptable levels, and data gained during their usage is used by ZAFT to develop subsequent beam weapons. Besides the cannons, the CGUE DEEP Arms' armaments include a heavy laser sword, a long physical sword with a laser edge, and the standard machine gun used by the original CGUE.