Marco Mazzoli (who plays Antonio Graziani) is the host of Italy's #1 radio show (Lo Zoo di 105).
Dolph Lundgren filmed this project after 'Aquaman' (2018) and before 'Creed II' (2018).
In 2014, the project was entitled "The Stranger". Actor / producer Walter Nudo and director Georgio Serafini approached Dolph Lundgren then but nothing happened and it stalled for a few years until the production reignited in late 2017 / early 2018.
Towards the end, when the chief criminal is going to shot Dolph, the hammer on the automatic pistol was down so it would have been impossible to fire the pistol.