I'll be honest, tinkering with brand new toys is totally normal. more expensive ones can be less likely but really can't say much. I've had to take files to brand new custom actions from a big name who I love so I won't mention. my personal accuracy international has been flawless but I've read of the newer model having a batch of ones that had weird feeding issues. it's anecdotal but I seen a picture of an entire large box full of probably 20 barret mrads that were cut in half due to a later discovered defect in the metal.
it can definitely happen and when bringing it out of the box for the first time is absolutely when you're likely to find them.
I too am a fan of the accutrigger and accustock. excellent value, works well enough.
also, I don't know because I've never gotten a bad one but I'm guessing their CS will take right good care of you.