When I got the game I got the N7 Warfare Gear DLC, I've installed it, but I have no idea what it does, apparently it adds 'Argus 55 Rifle, plus additional content'. Where do I get this rifle or do I start with it, and what's the additional content it's talking about?
You get the following with the DLC:
The weapons are available at the weapons bench, which is available at the shuttle bay of the Normandy.
The armor is available in your Cabin and in the Shutle Bay, where you can select amongst the various casual and armor outfits.