Premise: The Mannlicher–Schönauer (sometimes Anglicized as "Mannlicher Schoenauer," Hellenized as Τυφέκιον Μάνλιχερ or Όπλον Μάνλιχερ-Σενάουερ) is a type of rotary-magazine bolt-action rifle produced by Steyr Mannlicher for the Greek Army in 1903 and later was also used in small numbers by the Austro-Hungarian armies. Post war use was for civilian use such as hunting and target practice.
Hypothesis: The Mannlicher–Schönauer killed the most people.