I will first say that a well put together and taken care of AR system does not need to be run wet and if done may led to a stoppage because of trash in the system from over lubing. I would take a 22LR if given one choice. It will kill even the small wrens and not tear up what meat is there. People fail to understand that a well trained person can survive with this rifle as he will be able to take any weapon needed. Either from those who have died or come to close to the shelter. A 22LR can as seen on recent TV and from personal experience kill a 12 ft alligator which is loaded with plenty of good eating. It will also kill all those peter cottontails with little noise or meat damage. I would want a good supply of bleach or iodine as opposed to another gun.