ΔE 12.2, fair: the same colour family, but not a straight swap. Gun Corps Brown is a little lighter, cooler than Dark DAK Sand.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Gun Corps Brown is a little lighter, cooler than Dark DAK Sand.
The same difference applies the other way round: Dark DAK Sand is a little darker, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Dark DAK Sand on the colour wheel See Gun Corps Brown on the colour wheel
All matches: Dark DAK Sand equivalents · Gun Corps Brown equivalents