The difference between the first and second photograph of these two rifles is a very simple flash diffuser. It is made by cutting the top third off of an aluminum soda can, sticking the bottom of the can in a plastic container that Crystal Lite drink mix came, then taping up the back end and part of the face of the diffuser with black electrician's tape. I took a pocket knife and cut a square hole on the side of the can large enough to slip over the small pop-up flash of my Lumix DMZ-FZ8, and added a bit of extra tape over the hole to act as padding. If you extend the diffuser over the face of the lens aperture, you will need to put a lens shade on the camera to keep it from causing a flash artifact on the lens. This took me about 10 minutes with a pocket knife and a roll of tape.
I also bought a couple of sheets of neutral gray construction paper from the local art and hobby store. I stand on a short stool and shoot pretty much straight down using the diffuser. Even when I shine the rifles up with Howard's Feed 'n Wax, the diffuser eliminates most of the glare and the combination gives a very nice, deep gloss to the woodwork.