Exactly!It's kind of laughable to think that high volume manufacturers are hand fitting parts and tuning rifles for optimal performance. Those places are slapping parts together as quickly as possible and firing 1-2 function test rounds.
Colt rifles are assembled by UAW members, the quality of their builds is marginal at best, anymore.
Rifles with quality parts (mil spec or better), properly assembled will function just fine. If I'm in a life or death situation in my home, I do not need to worry if I can get off several thousand rounds before failure, I need to know that I can run 30 rounds without failure.