Then, a new round enters the chamber and the compressed spring pushes the bolt forward again, loading the bullet into the breech, leaving the gun ready to fire again.

[2] According to Fowler, North and Stronge, it is a delayed blowback operation, using a large external hammer and heavy spring.

[2] The reason why this operation system is able to work is because the Modelo 1905 has an open top design and the barrel was screwed into the breech.

This distinctive characteristic is due to the fact that the moving parts are in the mainspring housing which is located just underneath the slide instead of in the handle.

[5] In the years prior to production, the Modelo 1905 pistol was tested multiple times in Europe alongside various other handguns.

In late 1898, a board of army officers held a test in Bern, Switzerland between multiple pistols.

[6] The fact that the Modelo 1905 was not comparatively effective in testing against other pistols at the time is likely what led to its declined use in Europe.

On 15 March 1905, the Argentine Republic bought 1,020 Modelo 1905 pistols along with the necessary accessories (Holsters and stripper clips) and 1,019,700 rounds of ammunition.

According to Fowler, North and Stronge, "During the twentieth century technological improvements in weapon design meant that they more reliable, faster, and more deadly".

[2] This made the Luger a more combat ready pistol and allowed for much faster reloads along with less chance of dirt getting into the chamber.