Warzone and MW3 M4 best loadout and attachmentsOptic: Slimline Pro or Hybrid Firepoint.Stock: Corio Precio Factory.Rear Grip: Phantom Grip.Muzzle: FTac Castle Comp.Barrel: Hightower 20" Barrel.Best M4 Warzone class: Perks & equipmentBase Perk 1: Overkill.Base Perk 2: Bomb Squad.Bonus Perk: Resupply.Ultimate Perk: High Alert.Lethal: Semtex.Tactical Equipment: Flash Grenades.
