User blog comment:The Shadow User/Squadmates in Mass Effect 3/@comment-2250460-20101013042202/@comment-217683-20101015023139

Not exactly... they do carry weapons on their shoulders that likely are guns, but it's never stated how powerful they are. All that is said is that they can carry "the same size of weapons typically mounted on Alliance fighting vehicles". Size and power do not mean the same thing. After all, a 12-pounder Napoleon and a 75mm M1 Pack Howitzer are about the same size, but are vastly different in terms of firepower.