RE: Ruger Mini 14???
Now, "kit" ARs are another story in terms of reliability - and DO tend to be "finicky" unless the assembler knows what they're doing and doesn't have a substandard part mixed in with the good. "Major issues and not know what to do"? Yup, I know a couple guys who built their ARs in their garage. They enlighten me with new expletives every time I see them at the range.