The Mannlicher was one of the early automatic pistol designs. Like most such guns, a small number were made as carbine variants. This particular one is the first prototype 1901 carbine (you can see the number ‘1’ stamped on the bolt).
At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!