re: If you are afraid to buy a polymer lower for your AR........

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Don't know, but if your gun is in a fire, you're in a fricking bind

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Wait, just want to make sure I get this correct.

You can test a weapon by running over it with a pickup truck, but heat/flames are a no-go?

So its more likely to run over a rifle with a pickup truck, than say, put a rifle too close to a campfire, or it be in some sort of safe in a structure fire?