Abstract: The present invention relates to an ammunition handling system primarily for self-propelled artillery guns (1). According to the invention, the gun (1) in question is provided with carrier arms (19, 20) which are pivotally journalled in the chassis of the gun and which carry special ammunition magazines (21, 22) or cassettes in which a primary requirement of propellant charges (18) and shells (14) is stored. In such instance, the design of the carrier arms (19 and 20) and magazine (21, 22) is such that the magazine may be pivoted by simple manoeuvres forwards from a transport position where they are folded-in, in a direction towards the centre line of the gun, to a second position closely adjacent the loading breech of the gun or the replenishment position for auxiliary systems (13, 17) utilized on loading of the gun. The present invention also encompasses specific designs of the relevant magazines and a piece of ordnance designed in accordance with the inventive concept has herein disclosed.