Large-caliber gun having a breech assembly with multiple chambers

A large-caliber gun including a cradle and a recoiling mass mounted so as to be movable relative to the cradle, the recoiling mass including a barrel having a longitudinal axis and a breech assembly, the breech assembly including a breechblock secured to the barrel, a breech support movable in axial translation relative to the breechblock and coupled to a breech head, wherein the breech assembly further includes:

• a plurality of loading chambers each intended to receive a round of ammunition,
• a mechanism for moving the chambers and configured to support the chambers and successively place one of the chambers in a firing position, namely between the breechblock and the breech head and in alignment with the longitudinal axis of the barrel, and at least one other chamber in a feeding position, in which the at least one chamber is able to receive a round of ammunition via a rear end of the at least one chamber, and
• a locking mechanism configured to move the breech head and the chamber placed in the firing position, between an unlocked position and a locked position, wherein in the locked position the chamber is closed off at the rear end thereof by the breech head and opens out at a frond end thereof into the barrel, the locking mechanism being further configured to move both the breech head and the chamber placed in the firing position to the locked position by a movement of the breech head.