Originally Posted by SgtLumpy
Lose the gun, that's tough. Lose the gun and someone uses it to kill someone, um, that's really tough.
Agree wholeheartedly. Even worse, if your gun is really tucked away it might be weeks before you even know it's missing.
It probably won't be a pleasant experience if your gun is found at a crime scene and you traipse into the police station a few days later to report it stolen.
But more on topic - No, your polymer framed firearm will not melt if you leave it in th vehicle.