An M14 is more military, the civilian versions are semi autos.
I try keep my setups simple going bush. A good light bolt gun or double barrel shotgun, not much can go wrong.
Semi autos are more for knocking down herds of something, pigs and camels etc. Pest control.
But if you are going bush to live awhile and contemplate God, all you need is a compact bolt gun to stock your meat stores, defend yourself against animal attacks.
You still have to be prudent, prepare properly, to take care of people with you.
If you going out in ministry it’s a different story. You are on official business.
You can be as minimalist as you like, you can go out with nothing and be totally cared for by Divine providence.
The best preparation for ministry is prayer and fasting and people praying for you while you are out there.