Some of the best weapons are improvised. My favourite improvised weapon is: get a knife and tape it to a walking stick, that makes a spear, than attach a counterweight made out of a circular piece of stone or metal than attach a spike to the counterweight. Another weapon is to attach a folding knife to a rifle as a makeshift bayonet. Or use a hatchet and attach a hammer head to the blunt side.
If you have any ideas for a weapon, that could well save you or a friend, leave a message, below. I won't steal your ideas. Thanks.