Actuation system for a firearm

An actuation system for a firearm;

• said system comprising:
• a breechblock assembly adapted to close a breech ring of said firearm;
• a slide whereon said breechblock assembly is mounted;
• a linear guide whereon said slide is configured to slide linearly;
• and
• a cylindrical cam configured to be rotatably actuated by a motor and co-operating with said slide for controlling movement of said slide along said linear guide between a first operating position and a second operating position;
• an outer surface of said cylindrical cam defining a path having:
• a substantially annular first parking section wherein said slide is kept in said first operating position, wherein said breechblock assembly is in a remote position relative to said breech ring and allows extraction of the shell case and the insertion of a new piece of ammunition,
• a substantially annular second parking section wherein said slide is kept in said second operating position, wherein said breechblock assembly is in proximity to said breech ring and cooperates with said breech ring during the ammunition firing phases,
• a helical portion shaped forward intermediate section and a helical portion shaped backward intermediate section connecting said first parking section and said second parking section, and wherein said slide is moved forward from said first operating position to said second operating position and, respectively, backward from said second operating position to said first operating position.