Better Call of Duty: MW4 Builds from U4GM Picking the right gun in MW4 starts with the fight you expect, not the weapon everyone is posting about this week. On a cramped map, a quick SMG can save you before you even think about recoil. On a wide map, that same gun feels like throwing stones across a motorway. I've found that CoD MW4 Bot Lobbies are handy for trying builds in peace, especially when I want to focus on one detail instead...