You just need the assault rifle for self defense. If something is worth doing, it's worth overdoing. That's why you need a missle launcher. Those who live by the sword get shot by those who don't. If violence doesn't get you results, you aren't being violent enough.
Explosives make the finest skeleton keys.
If it's in an unmarked tank, it will blow up when you shoot it. If you catch a small flieing object, throw it back. If they threw it, you don't want it. Arrows DO penetrate body armor. Your comrades didn't come back to save you.