A machine gun comprising an ammunition belt feed mechanism comprising a mechanism for ejecting a last two links of an ammunition belt, and an ejecting ratchet configured to push on a penultimate link and actuated by mobile parts of the machine gun wherein the ejecting ratchet is secured to a belt traction mechanism, wherein the belt traction mechanism comprises an advancing ratchet configured to push, in use, against an ammunition item, wherein the ejecting ratchet and the advancing ratchet are formed as a single part.