Band Of Brilliance

Call Of Duty 4 : Modern Warfare 2

Sonic Boom is a Tier 2 perk in Call of Duty 4: Modern Warfare that increases the damage (and consequently the killzone radius within the blast radius) of all explosives used by the player. Explosive weapons that are affected by Sonic Boom are fragmentation grenadeslaunched grenadesComposition-4RPG-7s, andClaymore mines. Sonic Boom is canceled out by the Juggernaut perk and will not affect flashbangsstun grenades, or smoke grenades. Sonic Boom increases damage just enough for hand grenades to kill at the very edge of its blast radius. Other explosive items' kill radius are nearly doubled, but the increased blast radius of any of them aren't nearly as large as the hand grenade. This perk is not commonly used due to the availability of more versatile Tier 2 perks, but can be useful, as this perk may be used by players who mortar frags or use grenade launchers. Players may also combine this with claymores on objective based game modes. This perk is also useful because it may help to kill more foes in a large firefight or in a small map.

Some players make a class around this perk. They take a gun with a Grenade Launcher, and use the perks Sonic Boom and Martyrdom. This is very effective on small maps like Shipment.

If you need a reference for distance, look for the boxes on Shipment. The large cargo crates that you see a lot of in Shipment and Wet Work are exactly 256x100 units in size. 256 being 6.5 meters, the same exact range of the Frag Grenade's max blast radius.

Sonic Boom is the Call of Duty 4 equivalent of the Fireworks perk in Call of Duty: World at War and the Danger Close perk in Call of Duty: Modern Warfare 2.

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