Hello Carl and LSP.
Just to point it out: While it certainly does look like the parabreak-housing the front part is a C-model. SharkOwl you would have to use the saw and mate it with an A base.
Oh and another thing I see people miss making the MLU, is that they have the later "double sloted" type of gun cover found in C models.
Here is a link to a norwegian MLU on f-16.net
http://www.f-16.net/g3/var/resizes/f-16-photos/album03/aab.jpg?m=1371910570
The original NON-MLU gun port is like this:
https://upload.wikimedia.org/wikipedia/commons/2/25/F16cannon.JPG
\\Dan