For a look at some of the Kel-Tec reliability you disparage, would you do this with your rifle (after already running 500 rounds through it in one day):
Fast fire 30 rounds, ice bath, then 30 more rounds
Fact is, ALL platforms will have reliability issues in some situations. AKs generally go bang when you pull the trigger, but a VERY large percentage of them have terrible accuracy. It's one thing to go bang; it's another to deliver the round on-target.