The flak rounds developed by Galactic Horizon in YE 40 is a multi-purpose munition designed to splinter when expelled from the barrel creating a shrapnel or flak effect.
With low tier damage the flak round compensates with its large spread making a difficult to avoid hail of projectiles, designed to interrupt shield regeneration and provide large amounts of suppressing fire. Alternatively the spread can be reduced by altering the time and severity of shell splintering to provide a more concentrated fire mode.
The tracer round's only difference compared to standard rounds is the addition of a capsule of fluorescent liquid to provide easy shot tracking for pilots and allied ships to easily signal points to concentrate fire.