Uncharted 2: Among Thieves

This game is still in production, so, all weapons listed here are subject to change.

Beretta 92FS Inox

A silver 9mm Beretta M92FS Inox is one of the side-arms named "92FS" in the game

Kalashnikov AK-47

A AK-47 is used by the Mercenaries. and is also seen with Nathan in few Videos

FN FAL

The FN FAL can be seen in the hands of the enemies and with Nathan, it is named "FAL" in the game

Smith & Wesson Model 29 Revolver

Nate can be seen aiming with this weapon in one of the screenshots, is more likely to be named "Wess 44."

Colt Defender

Nate is seen using this in one of the gameplay videos, it's named ".45 Defender" in the game

Desert Eagle

Has been confirmed in the beta, it is called the "Desert 5" in game.

Mossberg 12 gauge shotgun

In one of the gameplay videos, it's seen carried by enemies, and it's also seen in the E3 trailer, named "Moss 12"

Franchi SPAS-12

Has been confirmed in the beta, it is called the "SAS 12" in game.

Colt M4

Nathan can be seen with a Colt M4 strapped on his back in some pictures of the game.

Micro Uzi

this one is seen in one of the gameplay videos, it's named "Micro 9mm"

RPG 7

It is seen used by Nate in the E3 Trailer