User blog comment:Didikins/Map gimmicks: why do these exist?/@comment-1916935-20150117042655/@comment-24756040-20150118053202

Modern Warfare cared by noting the M16 as the M16A4 to show it being a more recent iteration. As well, the M60E4 falls under this category.

With Advanced Warfare, there's no indication of this whatsoever, as they have the exact same names as their counterparts back in Ghosts. However, Modern Warfare has done it's fair share of this error commonly with the AK-47 in later games, as well as the M21 EBR in Modern Warfare 2 (that was more of an incorrect denotion than anything else, though).