yes, i know...a bit hypocritical...however i knew of all of the weapons in MW2 before there was even any mention of the games creation. weapons like the Beretta m93R and AA-12 were largely unknown until MW2, and if wasnt for MW2 those weapons would still be that way.
i mentioned the ACR/SCAR for the reason of they are the most modern and advanced standard layout assault rifles currently produced.
the AK platform for obvious reasons...its a timeless workhorse and its newer variants are stunning.
the F2000 because in my opinion it is the best looking bullpup currently produced, however even a Kel Tec RFB would be nice
http://www.keltecweapons.com/uploaded_files/ourguns/gallery/b_33c5cba5976e62bd471ae0e534396697RFB_left_6417hires.jpg