Stevens & Tool Co., and then Marlin-Rockwell.ĭuring this same period of time, O.F, and his sons Iver and Harold were also producing their own firearms in a loft in New Haven, Connecticut. After several years at Iver Johnson, he went on to spend time at Shattuck, J. There he very quickly began his career in designing shotguns, pistols, and rifles, which now bear the name of his employer, Iver Johnson. Mossberg, a Swedish immigrant, worked for some of the biggest names in the firearms industry, starting with Iver Johnson. This shotgun, which is used in law enforcement and in the shooting sports, is but one in a long list of firearms designed and manufactured by O.F. Most people associate the Mossberg name with the famous Model 500 series of slide action shotguns, one of the most popular weapons of our time.