Gotta link for where you ran across the term? A little more context would help.
So far the only thing I've found on NIL Lasers is this-
LASER NIL System Revolutionizing Traditional Liposuction Procedure | Health Travel Specialist
and I cannot image how it pertains to use on a firearm, except that maybe it is meant for getting rid of fat on an obese attacker so the bullet can reach the vitals. Doesn't seem awfully practical if that is the idea.
Sooooo, NIL can ONLY be used to shoot FAT people???