What Russian automatic gas-operated assault rifle was developed in the Soviet Union in 1947, and is still popularly used today?

The AK-47, developed in the Soviet Union in 1947, is still popularly used today for several reasons. Firstly, its reliability and durability make it suitable for harsh environments, such as extreme weather or difficult terrains. Secondly, its simple design allows for easy maintenance and repair, even without advanced technical knowledge. Thirdly, the AK-47 fires the widely available 7.62x39mm cartridge, which is relatively inexpensive and commonly found worldwide. Lastly, its reputation for being highly effective in combat situations has contributed to its continued popularity, as it has been widely used in conflicts around the globe over the past several decades.