Answer to pop quiz:
CQC manuals state that unprotected knuckles are likely to be broken or injured on buckles, knives, helmets and other gear.
Open palms are recommended instead, specifically the palm heel strike.
The only knuckled attack advised is the back fist in all its manifestations. Ligament damage and broken bones are less likely with this strike.
mushinmaster,
Which CQC??? Anyway, any combat involving the natural weapons or short range weapons (clubs, knives etc.) is CQC. WTF?
So your training was pointless?
Now I know why your site has needed updating for so long . . .
Respect.