Other countries with rising weapons businesses are Ukraine and Iran. The best endorsement for a weapons manufacturer is winning a war against a tough opponent.
The US, Russia and China all took turns losing wars to Afghanistan and Vietnam but nobody lines up to buy weapons from them because strategic victory (denying the enemy their war objectives) due to a lack of political will in the opponent or superior geography isn't the same thing as tactical victory due to better weapons.
Ukraine is the odd one out in that it has developed significant technological capabilities, largely with drones and anti-drone defences, and has active buyers for that tech.