Earlier quoted context omitted.
In my mind that is the only reason, because the USSR made a whole lot of them, and then shipped them out to every third-world country. It is for a similar reason AR-15s are so popular here in the USA, because the US Military mostly uses M16s ,which are almost the same, and therefore they are the "cool, I'm almost-for-really a soldier now" gun.
The popularity of the AR-15 is related to the popularity of the M16, but the "pretend you're a soldier" aspect isn't the main reason. A more complete explanation includes: - Lots of manufacturers - Reliable action (depending on manufacturer) - 5.56mm NATO and/or .223 Remington ammo is (or, before late 2012, was) relatively cheap - Light recoil - Tons of accessories available - Relatively accurate - Fun to shoot And a…
Saying someone owns an AR is sort of like (loosely) saying they own a PC - that could mean anything from an Intel NUC to a Xeon workstation in a huge case. There's a common architecture, but it's the flexibility of the architecture that makes it popular.