I noticed that although the Firotech Alchemer has a chance to cause Fire status, when I view the gun recipes in the Hall of Heroes it states nowhere that the Mk 2 or Firo Driver do. I haven't reached the 5* Hall of Heroes so I can't speak for the Magma Driver and I personally don't own any of the guns so I can't speak to whether or not the status effect doesn't occur in game. I just noticed that the status effects weren't in the two descriptions despite being in them on the wiki.