This baby I take with me at every hike.
It´s a Glock Feldmesser Modell FM-891 (Austria).
Cheap, Lightweight and because it´s a bayonet you can use it as a lance too.
Even the Russian Speznas use it:
http://army-news.ru/2012/08/xolodnoe-oruzhie-takticheskie-nozhi-glock-fm-7881/