Here is a view of the weapons we should see from GRFS.
It doesn't mention if this is PC or console but I think this gives us a good look at what we can expect.
ENJOY!
http://ghost-recon.ubi.com/gr-portal/en-GB/ghost-recon-future-soldier/weapons/gunpedia/assault_rifles/index.aspx
L22A2 - PDR
Personal Defense Rifle