Hello!
I ask everybody to correct me if I'm wrong, but I believe the M9 bayonet, despite being still used, is no more issued to (i.e. produced for) the military.
I think the very last contract for the M9 was awarded to the Ontario Knife company back in 2003.
But again, I'm not 100% sure.
I'm not considering the M9 bayonets made for the commercial sales.
Edit: I was posting as the same time as pwcosol.
Here is the reference I found about a very small (409 units
) contract in 2003 I was referring to.
http://www.usmilitaryknives.com/knife_knotes_9.htm
the article is titled "new purchases".