There are 3 colour variants of the tactical vest. Khaki, Brn and Olive. In previous builds the different textures worked however in the current build (alpha and dev) only one texture is being used (black). I also created my own mod using custom textures and they are no longer working
*UPDATE**
I've worked out this is just a config issue. The Tactical vest Khaki class (which all other tactical vests use as a base) is missing hiddenSelections[] = {"camo"};