User blog comment:StagedDom19/Missing the Main Problem/@comment-5124348-20120710142656/@comment-5274392-20120710165450

tl;dr?

Anyways, actually, the Codex entry states that many ships in the alliance had Thanix cannons by the start of ME3 (http://masseffect.wikia.com/wiki/Thanix). Also, it has never been stated that there is a difference between gameplay and story when it comes to guns. Since there is no proof of this I will leave it as an invalid arguement. I understand it was a barely incomplete reaper, that's why I uped the shots needed to kill it. Further, a skilled user of the Cain could easily hit a target of that size. As for the Terminus systems, the colonists should have never have gone there if the Alliance couldn't protect them.