Abstract: A tank mortar having a magazine receiving a plurality of fin-stabilized projectiles which can be selectively aligned with the barrel. The barrel is movable relative to the magazine to enable sealing engagement of the barrel with the selected magazine chamber. The weapon frame which rotatably receives the magazine has an upper portion in which the bottom of the barrel is axially shiftable, e.g. by a bayonet arrangement, and a lower portion which sealingly engages the bottom of the munition chamber which is aligned with the barrel includes the firing element which triggers the displacement of the projective from the round chamber through the barrel. The base of the weapon frame is also provided with a ball received in a socket which is shiftable to traverse the weapon.

Abstract: An adjustable, easily erectable field piece settable at variable elevation angles is described. A two-point support is adapted to pivotally carry an intermediate member which is affixed to a composite sleeve serving as a barrel support member. A mortar breech mechanism is affixed to a first telescopic leg of the two-point support, and is pivotally mounted in a ground plate at such first base point to removably engage the rear end of the barrel when the barrel is at an upper elevation angle suitable for mortar application. A separate cannon breech mechanism is pivotally carried by the rear end of the barrel for selective firing engagement with the rear end of the barrel when such barrel is moved by the two-point support to a relatively low elevation angle suitable for cannon applications.