The Madsen machine gun isn't your standard LMG. It looks different, runs different, swaps barrels decades before other models, and has a longevity like few others. Initially produced in 1902, it's one of the longest serving light machine guns, used by dozens of countries in 14 different calibers. The Madsen LMG has several unique features in addition to its longevity that are all a testament to this often unsung design | Rock Island Auction - Collector Firearms