the final artillerie inrichtingen design is known as the portuguese model ar-10. it is believed that approximately 4,000-5,000 portuguese variants were produced; nearly all of them were sold to the portuguese national defense ministry by the brussels-based arms dealer sidem international in 1960. the ar-10 was officially adopted by the portuguese paratrooper battalions "(caçadores páraquedistas)", and the rifle saw considerable combat service in portugal's counter-insurgency campaigns in angola and mozambique.