17th CenturyContinuation 2Ca. 1650:Application of bridle as a bearing for the tumbler in the flintlock.Ca. 1660:Steinschloß-Magazinpistolen von Mathias Kalthoff, Kopenhagen Ca. 1660:Flintlock revolver with four barrels each having 2 charges introduced by Cornelius Klett, Salzburg.1668:Holst invents a small mortar that is later called Coehorn. Multiple barrels are attached to a board parallelor behind each other and fired simultaneously.Ca. 1670:Introduction of rifles with double locks (Match- and flintlock in the Austrian Army.1673:Prove marks: In Liège Belgium, a law is implemented that: ‘All Liège weapons have to undergo a testingcontrol by the city and have to be tested and stamped by a sworn in controller. 1680-1690:Lorenzoni rifle with magazin beneath fthe barrel or 14 shots in lead balls and black powder.