Many of the tools in the soldier's arsenals are from things the grunts started doing in the field (moreso in war zones) that caught the eye of the higher-ups.
My dad became the first* certified "chainsaw carpenter" in the army when an officer saw him using a chainsaw to cut timers for building constructed by his engineering battalion. Prior to that, all they were issued were hand saws (not even electric). Within a short time (a couple years), the chainsaw was standard equipment for field construction. (*others probably used chainsaws as well, but he was the one that was seen and asked to create an official class for certifying others in use of a chainsaw during building construction).
In the news more recently, soldiers have been using silly string to detect trip wires when entering buildings. I suspect that solicitations for development of a military version of silly string (i.e. more expensive and in a camo-colored container) has already begun.
I can easily see some maverick unit trying this stuff out after a few too many of their buddies get hurt. What is $15k out of pocket to an attorney, business owner, etc. who is a member of a National Guard unit that got activated? As it is, the guys in Iraq are paying out of their own pocket to "up-armor" their standard-issue Hummers.
On second thought, those Haliburton truckers on convoy duty in Iraq might beat them to the punch.