User blog comment:AugFC/An in-depth look at AW's weapon design/@comment-1916935-20141226221037/@comment-3967954-20141227094238

Yeah, there are some 20mm rifles still in service, but my point is that they'll be useless against armor in 2050, and you certainly wouldn't need one the size of the Atlas 20mm. The NTW-20 is pretty light and portable compared to the ridiculously and needlessly large Atlas 20mm.