Specification Calibre : 105mm Length of gun : 3439mm Length of bore : 2870mm Rifling : 32 grooves , increasing right-hand twist 1/31.5 to 1/21.9. Breech mechanism : horizontal sliding block , percussion fired. Traverse : 51º Elevation : -5.5º to +71º Max gun range : 16740 meters Weight : 1660 kg / 3660 lb

This remarkable equipment was the heaviest weapon ever developed for mountain use.It was produced by the Austrian firm Böhler in response to an army development contract issued to both them and Rheinmetall.In the subsequent acceptance trials the latters entry was turned down.The Böhler weapon was thereafter issued to troops from 1942. Its appearance gives the impression of too much gun for too little carriage , but the ingenious design insured stability and safety during firing.It could be towed as a complete equipment , broken into four loads on single-axle trailers to be towed by four NSU Kettenrad tracked motor-cycles , or completely broken into five pack-loads for transport on mule-back.The wheels were attached to the split trail legs by spring suspension which together with the independent wheel brakes was built into each leg.As a result the wheels moved with the trail legs and when the legs were opened adopted a characteristic 'toed-in' attitude.In common with the Böhler-designed Geb G 43 a firing pedestal was incorporated beneath the carriage to give stable three-point support when firing and to accommodate the weapon to any tarrian.The wheels were of light alloy with solid tyres and large detachable spades were fitted to ends of the trail legs. Among the best mountain guns ever built numbers of these weapons survived the war and were to be found in service with a number of European countries until the middle 1960s.