i never took into account secondary uses, like how you can use the hammer to fix somthing and to bash a zombies skull. I guess the khukri can be used as both a weapon and tool. since thats basixally what its made for.
If your going to be using your stock for melee then you are going to be wanting another weapon besides the M4, its a great rifle, but that polymer stock want take much abuse, even the after markets aren't up to much
i would choose as my primary weapons my trusty bow and arrow. quick and silent, as well as a 12 gauge shot gun. secondary would be my 40 cal. smith and western.and a good club made out of a 4x4 lumber. thats about it. along with my brain!! the most important weapon of all.