Umarex Sportwaffen GmbH & Co. KG is a manufacturer of air guns , tear-gas and signal pistols, paintball markers under the RAM brand and airsoft guns, based in Arnsberg, Germany. In 1993 the Walther Arms firm was acquired by Umarex, who continued to manufacture under the Walther name in Ulm and Arnsberg. In 2010, Röhm Gesellschaft, the firearms division of Röhm GmbH was also acquired.