User blog comment:JAlbor/Call of Duty: Advanced Warfare Q&A/@comment-5189447-20141017040921/@comment-3548049-20141021091515

The weapons on offer are supposed to be futuristic, in accordance to the setting, despite having designs similar to modern weapons. The Ghosts weapons are probably placeholders (watchword 'probably', SHG might include them for real) like the M4A1 and UMP in Ghosts.