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by int_19h 2650 days ago
AK had its own issues, especially with accurate full auto fire. Adoption of M16, on the other hand, was partially backed by Project SALVO concept of accurate burst being much deadlier than a single heavier round. Originally it was supposed to be about flechettes, but they couldn't make that work. On the other hand, AR-10 was already there with a design that made recoil mitigation a priority - straight stock in line with bore, lighter reciprocating parts, and recoil impulse directed along the bore axis with no lateral component like you get from a piston. So scaling it down to a smaller round made sense.

And the design is not inherently less reliable - depending on the conditions, it can actually outpace AK. AK is more reliable in a sense that it can tolerate more obstructions in the action before it jams; but at the same time, loose tolerances and the design of its safety make it that much easier to get dirt in. So if you dump a lot of mud on both, AK fails first, even when you pit it against the original Vietnam-era M16 design - take a look:

https://www.youtube.com/watch?v=DX73uXs3xGU

https://www.youtube.com/watch?v=YAneTFiz5WU

https://www.youtube.com/watch?v=LyXndCxn9K4