Class customization in Call of Duty was relatively simplistic when it was first introduced in Call of Duty 4: Modern Warfare . Where Battlefield used classes as a form of strategic team composition, Call of Dut y 's Create-A-Class system focused more on player preference than anything else. Battlefield would eventually implement some broader aspects of weapon/equipment customization as a result, but never compromised on its commitment to team strategy. Then, Gunsmith in Modern Warfare brought we...