Many preps sound great in theory until you attempt to use them in a real-world emergency. If you fail to consider all the factors at play and the potential flaws in a plan, you're bound to run into trouble eventually. As Murphy's Law tells us, if something can go wrong, it often does. The best way to avoid these headaches is to practice and test your preps early and often.

Case in point: the super-extended 90-round AK mag seen in the Forgotten Weapons video below. The concept of a 90-round magazine sounds fine — more rounds to defend your home from the vicious Mad-Max-style marauders who might lay siege to it in some hypothetical apocalyptic scenario. But unsurprisingly, here in reality, it doesn't work so well.

Ian and his assistant Clay analyze the AK mag, which is actually three normal 30-round magazines cut and welded together. Then they take it out to the range with a full-auto RPK, and it only gets worse from there. It ends up holding substantially less than its intended capacity, and has some rather hilarious quirks that show up on the slow-mo camera. See for yourself:

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The lesson to be learned here is that you'd be much better off with three standard 30-round AK mags, as Ian concludes. But this is the sort of thing you learn by researching gear before you buy it, or at the very least, testing it before an emergency makes it a necessity. Even if you're left with buyer's remorse, it's better than being left with a silly-looking non-functional weapon when you need it.

Written by Patrick McCarthy