Hey ...

You can just tie your whistle with a piece of paracord outside your pack. ... you don't need an M-2 pouch to protect it ......
<img src="/images/graemlins/grin.gif" alt="" /> <img src="/images/graemlins/grin.gif" alt="" /> <img src="/images/graemlins/grin.gif" alt="" />
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Alain