I tend to think of a full walking stick size mono pod as a hiking/survival tool. I can of course shoot my rifle from it, but mono pods have other uses. You can mount a camera, , if you're injured or on rough terrain you can use it as a walking stick. Most telescope down to a relatively small size.
I would suggest finding quality one though because the cheap ones aren't very durable and are not strong enough to be used as a walking stick for very long.
Most of the time I don't take one but they can be handy.
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