A gun to last forever
The thoughtful reader will be struck immediately by the nonsensical nature of the very question: “How long does a gun last?”.
Clearly, a gun stored properly from new will last forever and a day, while a gun left propped against a shed in the elements will rust to ruination in a few months.
We need to be more careful with our definitions of longevity and robustness. We also need to be careful to define what kind of gun we are talking about if any kind of useful answer is to emerge from our deliberations.
Why, even, is the question a
