Abstract: A rapid-fire automatic gun is provided with a first magazine for a smaller number of rounds, and a second magazine for a greater number of rounds. The magazines include first and second round advancement members. The first of the round advancement members is controlled by the automatic gun itself, therefore round advancement speed, in the first magazine, is dependent upon the gun firing rate. The second round advancement members is driven by a driver which provides a maximum round advancement speed in the second magazine, for example 300 rounds per minute, considerably less than the maximum round advancement speed in the first magazine. When a difference in advancement speeds of the first and second magazines occurs, a transferring member for transferring rounds from the second to the first magazine provides gap formation in the row of rounds in the first magazine by successively filling them during and after firing.

Abstract: A device for automatic transfer of rounds of ammunition is utilized for a large-calibre firearm, for instance for ships or the like. The firearm comprises a magazine arranged on its elevating mass, and the firearm is set at a predetermined elevation at the loading of the magazine. Rounds are conveyed from an ammunition store via the underside of the mounting to the top of the mounting. A laterally displaceable cassette is arranged to receive rounds fed to it in an infeed position, and in an outfeed position to transfer rounds to the magazine when this has assumed the loading position. For the transfer of rounds from the cassette to the magazine of the firearm the potential energy of the rounds is utilized, so that no special transferring means working in the magazine need be utilized for this transfer.