The First Menu of the Weapons Armory has the following options :
Refill Bullet Ammo
Handguns
Machine Pistols
Assault Rifles
Sub machine guns
Light Machine Guns
Sniper Rifles
Shotguns
The player chooses to go in the Machine Pistols section, where the following weapons are seen in the menu :
FMG9
MP9
Skorpion
???
I can't read what the fourth weapon is. According to some people who played MW3 at Gamescom that weapon would be the PP2000. It appears as it says ''LOCKED'' for the moment (according to Captain Price).
The player chooses the Skorpion*, and he is then directed to the Attachments menu, where there seems to be a total of 9 attachments to chose from (a lot for a machine pistol). The only ones I could recognize were the Red Dot sight and Holographic sight.
Finally, he chooses the Holographic Sight on his Skorpion*.