EntityQ17132684· pop 5· linked from 26 articlesSubsonic ammunitionSign in to saveAmmunition designed to operate at velocities below the speed of sound, which at standard conditions is less than 273 m/s (900 ft/s) or Mach 0.80ConnectionsInternational Standard Book NumberEntitydigital object identifierEntityInternational Standard Serial NumberEntityspeed of soundEntityammunitionEntityQ180686EntityMach numberEntityQ229883EntitysuppressorEntity9×19 mm ParabellumEntitysonic boomEntity.45 ACPEntitysemi-automatic firearmEntity9×39mmEntity300 AAC BlackoutEntity.300 WhisperEntityCategoriesAmmunition