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— In-Game Description
Steve's Sonic Boom is a shotgun featured in Battlefield Heroes for the Royal Army and was introduced with the Aliens update on March 5th, 2013. The weapon is statistically and functionally identical as Sergei's Subwoofer for the National Army.
Unlike other shotguns, the Sonic Boom emits a wave of sonic energy once fired. This results in a sound wave that pushes back and damages enemy players.