RDM and Northrop Grumman collaborate on precision-guided long range artillery ammunition Written by defenceWeb - A G6 firing. Rheinmetall Denel Munition (RDM) and Northrop Grumman have signed a ten-year partnership agreement on precision-guided enhanced range artillery ammunition. The agreement was signed in February this year, but announced today by Rheinmetall, which said that over the next decade, the two companies plan to cooperate together in order to offer forward-looking ammunition technology to the international market, including the United States, to support future artillery operations. The partnership will focus, above all, on achieving an enhanced range 155 mm artillery round fitted with an integrated M1156 precision guidance kit (PGK), as well as on developing a new 155 mm projectile with an improved integrated propulsion system.