 These include the United States, Germany and the United Kingdom, amongst others.The United States' XM360, which was planned to equip the Future Combat Systems Mounted Combat System light tank and may be the M1 Abrams' next gun upgrade, is reportedly based on the XM291 and may include ETC technology, or portions of ETC technology.Tests of this gun have been performed using "precision ignition" technology, which may refer to ETC ignition.