I really like the 1912 model of the Steyr so I have decided to make it possible to 3d print one yourself. Most of the parts were resized a bit to fit better but the main frame remains unchanged so the size is accurate.
If you want to add springs the sizes are as follows:
1. 18.7 x 5.4mm (firing pin(not vital for operation))
2. 85 x 9mm (slider)
I have also included the .f3d and .stp files for ease of assembly.
The author remixed this model.
The sizes and tolerances have been changed in the 3mf files to account for 3d printing and to make the model possible to assemble.