at the AK, PK, M9, Glock, and P90. I think that these weapons might be fun in a weapons mod, but I don't think that they have a place in the game. As for the AK, I don't think the US would use them in Mexico to fight an enemy who is using G-36E's and HK 21E's for weapons.
Also, I'll murder for a .45 ACP in Ghost Recon.
because the mexian army uses the 5.56 doesnt mean the us army has to...
the SF in iraq and afganistan doesnt use the ak variants only because of the that , its also an reliable weapon and it has more stopping power