The Electro-Magnetic Laboratory Rail Gun is a 32-megajoule electro-magnetic laboratory rail gun being evaluated by the US Office of Naval Research (ONR) Naval Air Warfare and Weapons Department. The US Navy is pursuing development of the launcher system through two industry teams — General Atomics and BAE Systems – to reduce risk in the program and to foster innovation in next-generation shipboard weapons. The same amount of energy is released by the detonation of 4.8 kg (11 lb) of C4.