Metal Gear Solid 4 Guns?

Okay, so have you guys seen the gameplay trailers for MGS4? I mean it is really realistic and everything, and you can do pretty much everything. And then you see Snake's weapon inventory, he has a MP5SD, AK-47, M16, RPG, and a Javelin. Then you look at his body, and all you see is the pistol. Then the player selects the Javelin, and He pulls a huge rocket launcher out of his pocket!!?! What is going on with that? Are they going to fix that? Or is that how the game is going to be? Because I would expect better from Konami.