Perhaps it was due to a long period of peace, or perhaps because true firearms are practically inaccessible domestically—and even if they were, the vast majority of them are merely low-powered.
Of course, it is also possible that various film and television works have greatly diminished the true destructive power of firearms, leading many people to lack a clear understanding of the capabilities of modern weaponry.
Take, for instance, the M82A1 sniper rifle, which is known to many.
Chapter 373