Chile has been collaborating since 1987 with the United Kingdom firm Royal Ordnance to develop the Rayo (Lightning) multiple launch artillery rocket. The rocket is 3.2 meters long with a diameter of 160 millimeters and has a nominal range of 35 km. It is initially expected to be able to deliver high explosive and bomblet warheads. (1)
1. Christopher S. Foss,"UK-Chile rocket test launched," Jane's Defense Weekly, 13 Oct 90, p. 695.