In thirty plus years of playing on the woods I have never needed a survival gun, there were times when I wanted one but never needed one. I continue to make firearms part of my survival plans mainly because of the two legged type animals. In my main kit I keep a Ruger 10/22 along with several magazines it and for my EDC Colt 1911 as well as ammo for both. My 10/22 can be used for defense as well as hunting while my .45 is primarily for defense. As stated in several post I have been in several man made and natural disasters and the one thing they all had in common was that those with the will and means preyed upon those without the means or will to defend themselves.
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Depend on yourself, help those who are not able, and teach those that are.