Board Thread:Warhammer 40k General Discussion/@comment-24070571-20140424161341/@comment-6078851-20140425035936

a storm bolter is literally 2 bolters that have been slapped together to make the fabled storm bolter - if 1 is good then 2 must be better sort of thing, well...just look at the hurricane bolter :)

i think in fluff they're just the same as bolters but with double the volume of firepower, but in crunch they're assault 2 rather than the rapid fire of regular bolters.