If you pre-order Mass Effect 3 just about anywhere, you'll get the M55 Argus Assault Rifle for free. In addition to that weapon, you can get even more in-game swag should you drop some reservation bucks at GameStop (N7 Warfare Gear) or EA's own Origin online store (an AT12 Raider shotgun).
Care to take a look at the pre-order stuff in action? We've got a vid above and another below the break, and they're both full of space bullets.%Gallery-142871%
Sony PlayStation 3 (late 2012)
Microsoft Xbox One