LOL, usual translation errors from Italian to English, like the "battery" one ..... my bad .....
Gun = pistola (handgun, revolver or pistol)
Rifle = fucile (carabine, long gun, whatever you call it
)
I had to specify "handgun" better .....
Anyway, in my personal idea, the use of a handgun is the last resource, ever ..... first, always try to not fight, any way is good ..... if with normal person can be helpful the reason, with abnormal peoples also some crazy pose can work (one time i avoided to fight with two half-drunk idiots that was searching for troubles, just coming out from the car with a crowbar in hand, making a crazy face, and starting to walk against them shouting "blood, finally, yippee ....come here, you two, give me your blood, make me happy", and so on ..... you had to see how much quickly they reentered in the car and runned away
) ..... if the other insist to fight, try first with non-lethal defenses (taser, mace spray, unconventional weapons .....) ..... but if the opponent take out a gun and aim at you, and there's absolutely no way for avoid to use it, well ..... i always keep at my life more than what i keep at my opponent life, after all