I was reading some old forums on another gaming site and found out that it was supposed to be in the game along with numerous weapons including the Hydra Launcher but was cut during development. I was playing mass effect 2 the other day and i noticeed there were supposed to be more upgrades like disrupter torpedos, mines and missiles and have a suspicion that with the right heavy ordinance you could blow the door to the collecter base. Let's hope this is in the remastered edition!!!! In the main Gun Battery room there is a console with a codex about weapons that are not in the game. I also have a suspicion there actually was a recruitable Batarian squad member at one point too because Garius said he had a batarian engineer on his team who was his tech expert.