日俄战争(1904～1905年)结束后,日本从中吸取经验,一度对能够代替人力抛掷榴弹的武器很感兴趣,并最终在大正十年(1921年)设计定型了一种步兵使用的轻型前装式曲射火炮,即大正十年式50mm掷弹筒。这种武器轻便易携,能够有效杀伤暴露的有生目标和毁伤没有顶部覆盖的固定火力点。其配用的弹药是一种专门设计的两用掷弹筒弹,所谓“两用”即除了能够以掷弹筒发射外,还可以当作普通手榴弹由人来投掷。但由于十年式掷弹筒采用滑膛身管,射程偏近,同 After the Russo-Japanese War (1904-1905), Japan learned from it and was once very interested in weapons capable of replacing human-powered grenades. In the end, during the Taisho decade (1921), Japan designed and engineered a light-weight Mounted music artillery, that is, Taisho 10-year-long 50mm barrel. Light and portable, this weapon can effectively kill exposed biological targets and damage fixed fire points without a top cover. Its equipped with ammunition is a specially designed dual-purpose grenade bomb, the so-called “dual-use ” that is able to launch in addition to the launcher, but also can be used as ordinary grenades thrown by people. However, due to the ten-year type of barrel using smooth tube, range is short, the same