Piotr Wilniewczyc
| Piotr Wilniewczyc | |
|---|---|
| Inventor of the ViS | |
| Born | 31 January 1887 | 
| Died | 23 December 1960 (aged 73) | 
Piotr Wilniewczyc (1887–1960) was a Polish engineer and arms designer. Among his most successful designs were the Vis-35 pistol, commonly known as the Radom for the arsenal in which it was produced, and the Mors submachine gun.