Firearm

A firearm, comprising a frame (1) in which a breech block carrier (4) is arranged, as well as a barrel (2) having a rear face (3) behind which a breech block (5) is arranged in the frame (1), characterized in that the barrel (2) is firmly connected to a barrel sleeve (6),

• and the barrel sleeve (6) is slidingly mounted in a linear guide in the frame (1), wherein the breech block (5) is mounted behind the rear face (3) of the barrel (2) slidingly in a direction of a barrel (2) axis,
• and the breech block carrier (4) is slidingly mounted in a linear guide in the frame (1)
• wherein on a top side of the breech block (5), a vertically movable locking block (9) is arranged, and the locking block (9) can be introduced into a recess (10) in the barrel sleeve (6),
• wherein the frame (1) is provided with a front stop (12) for the barrel sleeve (6), and a rear stop (13) for the barrel sleeve (6),
• and the barrel sleeve (6) is provided with a front stop (15) for the breech block (5), and a rear stop (16) for the breech block carrier (4),
• wherein a barrel spring (14) is arranged between the frame (1) and the barrel sleeve (6).