Glocks are widely considered to be the most reliable weapons around yet the problems section of their forum has over 37,000 posts. Not all of them are Glocks problems but many are. Glocks are still fine weapons. There are only 180 posts of problems with the M&Ps here. I have never actually seen anyone have a problem with them and both of mine have been 100%. Best guns I've ever had.
Most people who have problems are going to post them looking for solutions or just out of spite. People who are satisfied rarely feel the need to post it.
Anything man made will have problems. If that scares you, you might want to avoid houses, appliances, motor conveyances, bicycles, medical technology, etc. and move into the woods to live completely off of the land.
But out there you'll find bears, mountain lions, poisonous snakes, inclimate weather and likely die of dysentery.
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