"Ranjit Singh must take credit for the development of the artillery in his army. Right from 1807 he was seized with the idea of manufacturing his own cannons. This was the year he established his first workshop for casting of the barrels of cannons. In another 2 years mortars were produced and Ranjit instructed his chief engineer Mian Qadir Bakhsh a Muslim, to study the British guns and make similar copies. Ranjit also on the advice of his French generals set up the horse drawn artillery."

http://madangsingh.expertscolumn.com/article/artillery-sikh-army-under-maharajah-ranjeet-singh