Why were Kalashnikov rifles adopted and produced by so many countries?

The Kalashnikov rifle, or AK-47, became one of the most widely produced and adopted small arms in history due to several key design and geopolitical factors:

• Operational Simplicity and Reliability: From its adoption in 1949, the weapon was recognized for being simple to operate, rugged, and highly reliable even under difficult environmental conditions.1
• Ease of Manufacturing: The design was specifically amenable to mass production. Later iterations, such as the AKM, further simplified manufacturing by utilizing stamped sheet-metal parts.1
• Geopolitical Influence: The rifles were adopted as the standard shoulder weapon by many nations that maintained political and military ties to the Soviet Union. Additionally, the design became a favored choice for numerous guerrilla and nationalist movements globally.1
• Proliferation: It is estimated that approximately 100 million AK-series rifles have been produced. Roughly half of these were manufactured outside of Russia, often under expired Soviet-era licenses or without any formal license at all.1