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Nitecore NTP31
NITECORE NTP31 is a uniquely designed aluminum alloy bolt action tactical pen. The three position bidirectional bolt action allows you to pop out the pen tip or windows breaker, or retract both for everyday carry.
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Understand it first
Land navigation your phone can't give you
Map, compass, pace count, and terrain association — the Army way (TC 3-25.26), for the day the battery dies.
Survival priorities, straight from the field manual
The rule of threes, fire, water, and signaling — what FM 3-05.70 actually teaches, minus the TV drama.
Water when the tap stops
How much to keep, how to make questionable water safe, and the real difference between a filter and a purifier.
The 72-hour kit, item by item
The baseline list with the reasoning attached, what it honestly weighs, and what $150, $250, and $500 each cover.
Knife sharpening, from dull to working sharp
Angles, stones versus guided systems, stropping, serrations, and the field touch-up that matters more than any of it.
Field skills: knots, fire, shelter, water, signaling
The five that carry the most weight outdoors, why each one fails, and what this page leaves out on purpose.