North Korea’s state media described the country’s new 300mm rocket artillery system for the first time on Friday. The article and photographs published by state media – combined with the data reported by the South Korean military Thursday – revealed details of the weapon, including that it may be among the longest ranging of such weapons and may take design cues from American-made weapons.

The 300mm multiple rocket launcher (MRL) has been suspected to exist since at least 2014 and was first shown in a parade in Pyongyang on October 10, 2015, but Friday’s report is the first time Pyongyang’s media has clearly described the system in conjunction with photographs.