Thanks for the comments guys.
I agree that either of these patterns is most effective when on the forest floor. (Hence that's where the snakes live). So firing in a prone position, amongst dried leaves, would be ideal.
However, at this point in time, tactical effectiveness is not a primary concern. I'm more looking to do a refinish exercise.
The copperhead may be the best to start out with, since it has fewer colors and simplier shapes.
I think the geometric pattern of the Gaboon would look awesome on an AR, but as a first time paint job, it could prove very difficult to effectively replicate.
Also, the camo effect of both of these snakes is amplified when they are coiled up, as opposed to stretched out. How does that translate to a rifle? I don't know.
Cowboy7243001, You're right. Anyone who hasn't experienced a CH in the wild can't understand how incredible effective their camo actually is!
I will most definitely post pics of the finished product, but I'm not putting a timeline on it. I tend to work slow and methodically!