User blog comment:Bovell/Lots of new Battlefield 3 details via Twitter, DreamHack festival, PSM3, and interview/@comment-3362918-20110623173111/@comment-1840523-20110624100031

@Pres - I quote exactly from the blog post - "Keep in mind that there are three slots on every weapon that can be customized to the player's liking, such as adding a flash suppressor or flashlight."