A rifle has a fixed main body, including a barrel, a receiver with an upper opening, and a breech element. A trigger group is at least partially housed in the receiver, including a trigger, a hammer device operable by the trigger, and a safety member positionable in a shooting position, disengaged from the hammer device and in a safety position, engaged with and blocking the hammer device. A carriage assembly with a shutter group is positioned on the receiver at the upper opening and axially movable by the user between an advanced shooting configuration and a retracted rearming configuration. The carriage assembly includes a safety group controllable by the user, with the carriage assembly in the advanced configuration, in a ready-to-shoot configuration, in which it is disengaged from the safety member, and a safety configuration, in which it engages and keeps the safety member in the safety position.