I was wondering if anyone has used his own knife/ multitool during NS. And if so what are the restrictions: knife type, blade length, can use during bmt?
Go right ahead, but if you lose or damage it, don't lay the blame on anyone else.
Bring chopper better, chop all the sadists.
All depends on how much of a tightass your boss is. I swapped my bayonet over for a Gerber Mark II and I also used a Gerber Cliplock as a boot knife. That was only after I went operational, though - forget about doing it during BMT.