Currently the configuration of the 'class Iron' OpticsModes for class optic_SOS inherits the discreteDistance zeroing array of the 'class Snip' scope view.

This means that the small, fixed ironsights on top of the SOS scope can be zeroed between 300 and 2300 meters separately from the zero setting for the scope view. Like the primary scope mode, the default zero for the secondary backup sight mode is 600 meters (before adjustment), which is quite large to begin with.

Realistically the backup sights should only have a fixed zero, probably somewhere between 100 and 300 meters for use in close-quarters, rather than the ability to be dialled out anywhere up to 2.3km for long-range shooting.