Call of Duty allows players to customize their weapon with various camos, attachments, and loadouts to suit their taste and playstyle. Like every year, the weapon camo grind is a huge part of Call of Duty's multiplayer, with players wanting to show off how badass they are with their camos. Luckily, players can access all their Modern Warfare 2 weapons in MW3, including the weapon camos they’ve already unlocked.