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Grappling hook gun

I want to know how to make the smallest grappling hook gun and the mot powerful

simple idea: crossbow
tomtortoise6 years ago
Ok i made the instructable it will be up whenever the website is updated so just search my name in a day or so
tomtortoise6 years ago
yo i have an idea for you i can prob do it by the end of tomorrow.
something946 years ago
i asked for this over a year ago and haven't found anything. i don't think anyones gonna make it.