Isidro Soler, born 1740-41 in the village of Altarriva was a disciple of Francisco López, and won the appointment of honorary gunsmith to Carlos III in 1776. In 1795 he published his Compendio histórico de los arcabuceros de Madrid. In 1797 he was chosen to care for the personal arms of Carlos IV. During the Peninsular War he was the only one of the four royal gunsmiths to survive, regaining his royal appointment in 1814, until his complete disability in 1818. He died in 1825