On my predator gun, I use half of a rifle gun sock.I figure the butt of my gun is either right next to my body on one side and my right arm covers the other side of the stock, plus, if the rifle is point in the direction of the predator, it's not going to see anything but a tiny black hole and a big black hole, being the gun barrel and the scope. If the ground is covered in snow I cover the front with an old sock. I think as long as nothing is shiny, nothing to worry about.My scope is matte balck, I don't cover it with anything.My video camara that is mounted on top, I use one sided fleece tape to cover it, it is too shiny other wise.