[Estonian Army presently holds 30](https://defence24.pl/power-arms/estonia-received-rail-partie-haubic-k9a1) with a full of 36 cannonhaubic K9A1 orders coming from equipment surplus South Korean Armed Forces. They are utilized vehicles, like the first 36 K9A1 purchased by Poland. They will all be brought to the K9EST Kõu standard, which consists in adapting them to the requirements of the contracting authority by, among others, receiving national communications, fire systems and new, more appropriate painting.