Sonic Boom

Sonic Boom is a second tier perk in Call of Duty 4: Modern Warfare that increases the damage and the blast radius of all explosives used by the player. Explosive weapons that are affected by Sonic Boom are fragmentation grenades, launched grenades, Composition-4 charges, RPG-7s, and Claymore mines. Sonic Boom is canceled out by the Juggernaut perk. Sonic Boom will not affect flashbangs, stun grenades or smoke grenades.

Multiplayer Tactics
A perk not commonly used due to the availability of better Tier 2 perks. This may be used by players who like using Frag mortaring or “Noob Tubes”. Player may also combine this with Claymores on objective based game modes.