The Swiss, Karabiner Model 31 or also known in collector slang as the Swiss Schmidt-Rubin K31 was adopted in 1933 and stayed in service until 1958. Based on a long lineage of straight pull bolt action rifles, beginning with the Schmidt-Rubin Model 1889. Rubin designed the bullet that was combined with Schmidt's straight pull bolt rifle.
A very accurate, detachable magazine fed rifle with a very unique straight pull bolt that allowed the soldier to quickly chamber rounds by pulling straight back on the bolt and then slamming it forward. Very revolutionary engineering in a battle rifle for the late 1800's. Because of the straight pull bolt technology the Swiss soldier did not have to raise up (exposing themselves to enemy fire) and chamber a round, like a standard turn-bolt rifle.
