Max Payne 3's Local Justice DLC pack are online, you can't afford not to study them. What if you show up guns blazing in the pool of the Imperial Palace, only to find your opponents have strategically placed themselves on the balconies, where they know they'll have a clear shot to your skull? In this case, you have to assume everyone will study these maps, lest you be the only one who doesn't.
Rockstar has laid out The Imperial Palace, 55th Battalion HQ and Departure Lounge, all three from the Max Payne 3 campaign and optimized for multiplayer battles. Take a gander at the maps below or on the Rockstar newswire. Local Justice is set to drop July 3 for PS3 and Xbox 360, and July 17 for PC.