Specification Calibre : 75mm Length of gun : 750mm Length of bore : 458mm Rifling : 28 grooves , uniform right-hand twist 1/52. Breech mechanism : horizontal sliding block , percussion fired. Traverse : 360º below 20º elevation , 60º above 20º elevation. Elevation : -15º to +42º Max gun range : 6800 meters Weight : 145 kg / 320 lb

This the first of its kind to be introduced was originally known as the LG 1 but was later renamed in accordance with the usual 'year of origin' terminology system.It was built in four parts each capable of parachute descent without the need for special packing , the ordnance split into barrel and breech assembly while a simple top carriage and a wheeled tripod assembly formed the rest of the equipment.Although Rheinmetall were responsible for the basic research both they and Krupp were given development contracts and both produced prototypes.The Krupp model used a very simple side-swinging breech mechanism and was mounted on two motorcycle wheels , while the Rheinmetall type used a horizontal sliding breech block and two small aircraft-type wheels.The latter was the one accepted for service.Extensive use was made of light alloy in the mounting to save weight and to prevent the back blast from ricocheting on to the detachment , the elevation and traverse gears were interconnected so that the normal 360º traverse was restricted to 30º each way as soon as the elevation reached 20º. The firing mechanism was placed in a stream-lined housing in the center of the jet venturi so that a normal type of primer in the center of the plastic case base could be used.The danger area at the rear of the gun extended to 100 meters for practice firing or 50 meters for combat firing , this however referred only to the actual jet blast and stones and debris were disturbed some considerable distance beyond this.Firing instructions also emphasized the danger to the detachment members ears from the blast and recommended them to plug their ears tightly.