Having an understanding of how each part effects the other in the mechbox and knowing whats available is key to diagnosing what sort of replacement your going to need, and that only comes from physical experience. Without that knowledge, you are second guessing (And I stress GUESSING) a design team that tested everything in your gun to make sure it was working the way it should. It just doesn't make any sense to do that which is why people are reacting this way. Not all guns need to be upgraded, most people learn how to do that by repairing broken ones where there is nothing to lose.
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