I used my phone for these shots of my recently completed P80 Build #2 (G19 clone). Also used a light box and a white gun stand.
You'll notice that the pistol stand sort of "disappears" in most of the photos. I did this by cranking up the exposure in Photoshop, which served double-duty by lightening the underexposed gun.
When shooting a small dark subject on a light background, the auto-exposure on the camera is going to read the overall light background and shorten the exposure. This turns the white background (below) to a neutral gray. This results in the dark subject being rendered even darker, which can obscure the details.
So, in Photoshop (or other photo enhancing software), you can crank up the exposure to bring the dark subject "UP." This will cause the light background to "burn out." In this case, the background (including the pistol stand) are of no interest anyway. So, it's a benefit. Hope that made sense! Here's a before & after photoshop.
This can also be done on the camera with manual exposure settings.
Taking it a step further, I can use photoshop to get rid of what's left of the pistol stand showing in the photo, creating a "floating" gun:
