| So, you want worst case scenario, huh? Well, let's say you have no cleaning supplies and it's the dead of winter in an area where everything is either underground or hibernating, so no animal fat.
How do you keep your firearm from rusting?... It's been answered in this forum once before: Nose Grease.
Yes, that's right, the grease from your nose (most easily found on the sides of your nostrils next to your cheekbone) works as a good lubricant for moving parts, if it's all ya got. The good Lord provides in mysterious ways, He does.
To clean the barrel, boil water over a fire (if you can't make a fire, you're as good as dead anyways) and pour it down the barrel. Allow it to dry, which it will do rather quickly, as it was boiling water, and use a straight stick to push a piece of cloth (one you had with you or a small piece you tore from your clothing) with your nose grease on it down the bore. Then, do the same with any other necessary parts, such as the bolt and rails. Don't throw away that little piece of cloth, keep using it until it's pretty much useless and then tear off another small piece; should last you quite a while.
__________________  |