Abstract: A firearm of the type which loads from the bottom of the recoil jacket includes protective doors opened by the loading mechanism as it rises into ramming position. One pair of doors is mounted in the recoil jacket and another is mounted on the barrel at a different height from the first, so that the doors slide along one another when the firearm recoils.

Abstract: A loading pendulum picks up an ammunition round from a magazine fixed to a tank body, traverses around the tank to the position of the tank gun, raises the round into the recoil housing of the gun and, following ramming returns to the magazine for the next round.

Abstract: A tank supporting a large-caliber firearm which can be raised and lowered relative to the tank chassis. A first magazine is hingedly connected to the firearm at its rear end, and a second magazine is hingedly connected to the tank chassis. When the barrel of the firearm is in its zero traverse position and in its lowermost position relative to the tank chassis, the first and second magazines are interconnected and a hoisting apparatus lifts successive rounds of ammunition from the second magazine to the first magazine, and the rounds are then rammed into the barrel of the firearm.

Abstract: A device for a magazine comprises a number of tubular containers which are arranged in an endless chain, intended to contain rounds, and provided with blocking members for fixing the respective rounds in the longitudinal direction in the containers, driving devices for driving the containers around in the magazine, and a releasing device which in a common feed-out position for the rounds in the magazine can coact with the blocking members of the containers.

Abstract: An improved mounting apparatus for high-calibre guns, for use on mobile platforms such as tanks includes a support for the gun which permits the elevation trunnions to be moved vertically from a lowered, small silhouette position to a raised position which permits optimum movement in train and elevation.

Abstract: A magazine, for use on a tank having a large calibre firearm thereon, takes the form of a magazine body which is separate from the tank chassis and which is freely suspended low on the tank on the outside of the tank chassis at the rear end of the tank.