How a Steyr M1912 works
The Steyr M1912, also known as the Steyr-Hahn, is a semi-automatic pistol developed in 1911 by the Austrian firm Steyr Mannlicher, based on the mechanism of the Roth–Steyr M1907. It was developed for the Austro-Hungarian Army and adopted in 1912. “The M1912 is an excellent pistol, strong and reliable,” and was able to endure the adverse conditions of trench warfare during World War I.
The M1912 was originally chambered for the 9mm Steyr round.
Steyr M1912: full disassembly & assembly
This video was created using the program World of Guns: Gun Disassembly:
Also, you can find this application on Google Play, App Store and Amazon.