2 or 4.
With that said, I think anything that breaks up the outline of the rifle would be fine. I think what makes a gun, especially an all black gun, stand out is not that it’s black, but that nothing in nature is one and only one color. Therefore it stands out.
It’s similar to what my dad once told me about how to look for deer: Look for the horizontal line made by their back. Most lines in nature are verticle lines created by things reaching for the sun. A horizontal line is rare and worth paying attention to.
Grouse