The C-93 was the first ever mass-produced semi-automatic pistol, designed in 1893 and based on the same kind of toggle lock mechanism that was used in the recently developed heavy machine guns. The C-93 was reliable and established the modern standard of having a detachable box magazine in the grip, which was a novelty at the time.
The first ever successful rimless pistol cartridge was also developed for the C-93, and it became the basis for the primary cartridge for the famous C96 pistol. The C-93 was sold commercially and over 3000 pistols were produced, but although a number of nations' militaries tested the weapon, no armed force adopted it, mainly because of its rather awkward ergonomics, recoil that was difficult to control, and high production cost. It did, however, come standard with a detachable shoulder stock that when attached remedied the ergonomics and turned the C-93 into quite a handy and effective semi-automatic carbine.
Although it was never officially adopted, the pistol did see action in the Second Boer War of 1899 - 1902, and was likely used as a private purchase sidearm by some officers in WW1. After going through several military trials, there were requests for design changes to the C-93 to make it more viable, but the gun's designed refused to make any changes to it. Instead, the job to improve upon the design went to his former assistant, who took the toggle lock action of the C-93 and refined it into a handgun that became a true legend - the P08 Pistol.