So I bought a 3 point sling for my 870 and was going to do a traditional for my M4. I figure in a shtf scenario, if the zombies come I would use the shotgun first and pull the M4 if needed or for distance. Now I am second guessing and thinking the M4 up front because is more versatile and carries more rounds. Thoughts? I dont think I have heard much philosophy on a 3 gun carry (handgun too) in a shtf scenario. I know I know it depends on the situation/terrain, so lets say suburbs and out and about. Thoughts?