PERK2 BOOM SONICO

Increases the damage dealt by explosives to 125%. Applies to Grenades and C4 as well as the Grenade Launcher.

While it greatly increases explosive range, the maximum explosives you have is two, unless you use overkill with two grenade launcher weapons, but then you can’t use perk 2 and therefore can’t use this perk. Anyhow, so with two explosives, yes while it’s a much bigger explosion and you will have a greater chance to kill people, this will take away a perfectly good perk 2, and after your explosives are gone, you have to fight with your guns raw power. Of course it also applies to grenades too, but you don’t want to have to rely on them. Great perk for completing some of the explosive kill challenges, like killing two people with one RPG, etc. Applies for ALL explosives (except for things like car explosions.)
Sonic Boom is available by default.