I'm thinking this might be to freshen up the S6 product for its next release. Not sure if it makes sense for people with S6s already to buy it although the M16 name is kinda cool if it sticks.
I think its old <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> Unless you know otherwise.
CRKT has the "M16" and Dan may have wanted to stay more original, hence a name change to Scrapper6.
Just what I'm thinking, I have no facts behind my reasoning.