ΔE 11.9, fair: the same colour family, but not a straight swap. Red Rage is a little lighter, more saturated than Rifle Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Red Rage is a little lighter, more saturated than Rifle Brown.
The same difference applies the other way round: Rifle Brown is a little darker, more muted.
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 Rifle Brown on the colour wheel See Red Rage on the colour wheel
All matches: Rifle Brown equivalents · Red Rage equivalents