Most who served in Nam already had the M16 in hand and were never trained on the M1 or M14. Only the earliest participants had that experience. Those that used both have stated in the past their preference for either. It's not a slam dunk they universally hated the M16. It's another internet myth perpetuated by big caliber piston fans.
Unless the house is burning, I wouldn't leave. When we did have a disaster, we didn't leave. No power, no water, in May, and the roads were initially closed by tornado debris, then later by the authorities to prevent sightseers clogging the streets.
The first thing anyone grabbed was a chain saw. In America, that's always been the #1 disaster tool of response. Not a gun. Obviously small town America can deal with things, because they have to. Power outages aren't infrequent, the weather can close roads, and it's just part of life.
We go camping - but stay at home. Propane is the fuel, ice in a cooler becomes the commodity item. Canned goods are already in the pantry. If you have to do without refrigeration, ok. Everyone grills a lot of stuff before it thaws. Generators are dragged out of garages and fired up, although the last ice storm did make believers of some that the price of fuel ($40 a day for a 10KW unit) had finally gotten out of hand.
Point being - leaving the home is largely a URBAN fantasy. Those who want to go wandering around on foot looking for a high school gym to live in, or hike into the wilderness we just spent 150 years hacking our way out of, are not going to get a warm and welcoming reception at the farmer's door step with any kind of gun visible.
I can't imagine why so many are clueless about this. But then again, live in a population of more than 1000 per square mile, and people get dense.
One thing that's alway missing from these scenarios is that your neighbors in outlying areas are not going to be at the city limits with the keys to Town Hall in their hand. Refugees will be directed, contained, and controlled. Wanderers will be rounded up, even involuntarily, and dropped off at relief centers. Roads will be closed, and the SUV's directed to the next gas station. Hope you don't run out.
Don't study downtown New Orleans for your zombie scenario, ask around about the clogged interstate out of town, no gas, no food, no water.Check with those who had their vehicles towed, vandalized, etc. when they had to abandon them.
This survivalist fantasy isn't the answer and is largely one based on ignorance. Those who know better (quite a few in this thread) are trying to point it out.