Semi-automatic pistol with a sliding barrel

A semi-automatic pistol comprising:

• a frame, wherein a barrel is arranged in said frame and a firing chamber of which is associated with a receiving cavity for receiving a cartridge, said receiving cavity being provided with a downwards opening to communicate with a magazine, and with a side ejection port associated with a mechanism for extracting and ejecting a case after shooting;
• and
• a firing mechanism comprising a striker mounted so that said striker can pivot in a rear portion of the pistol and suitable to initiate firing the cartridge inside the firing chamber, and a trigger integral with an actuating arm which acts on a means for arming and retaining the striker in an armed position, wherein the barrel is mounted in an axially slidable manner between a forward position to which said barrel is driven by friction of a bullet when firing the cartridge, and a recoiled position to which said barrel is pushed by a recoil spring until reloading a new cartridge, said means for arming and retaining the striker comprising a link which at a back end thereof is connected to the striker by means of an articulation and which is operated by means of a lever pivotably mounted inside the frame, said lever having a top end operated by the barrel during movement of said barrel to said forward position in order to pivot said lever, and a bottom end forming a cam that acts on said link during pivoting of said lever, pushing said lever back so as to rearm the striker.