Keywords: M224 FCU 1.jpg en The Office of Naval Research's new Fire Control Unit 60mm Mortar sight also contains an onboard ballistic library allowing for multiple cartridge employment http //www stripes com/news/marines-in-afghanistan-getting-mortar-improvements-1 251538 gallery John Williams/U S Navy 2013-11-05 M224 Mortar Marine Corps Base Quantico PD-USGov-Military-Navy |