RPG x2 is a first tier perk in Call of Duty 4: Modern Warfare that gives the player a RPG-7 and two rockets in their inventory. The RPG-7 rocket is inaccurate because the rocket tends to swerve in a random direction after a certain distance, although it has a less swerve if aimed by the iron sights before shooting. RPG-7 rockets can be combined with the perk "Sonic Boom" to increase the damage of the rockets by 40% (from 1000 damage to 1400 damage).
RPG-7 x2 returns as a purchasable "weapon" in Call of Duty: Modern Warfare 3 Survival Mode at the Equipment Armory for the price of $2000, that gives an RPG-7 with 2 Rockets to the player. The player may carry up to 4 RPG-7 Rockets.