Linda -
No high tech lighting here. The gun was placed on a large sheet of white countertop fiber-based plastic, laid out on the ground, that I bought specifically for photographing rifles. I shot it outdoors on a cloudy day in the shade to get the diffused light with soft shadows. The rifle was propped up on its back side with a glob of modeling clay to hold it, slightly angled towards the camera, in place. I shot it at aperture priority f/8 to get good depth of focus, at 1/20th of a second, ISO 100. My camera, a Pentax K200D with 10.2 megapixel capacity, has a shake reduction feature that's worth +2 stops, so I was able to stand over it and take the shot hand-held. I used spot metering on the dark metal to be sure there was enough exposure. The lens was a Pentax 18-55mm f/3.5-5.6, set at around 26mm. The picture was then cropped and reduced in size via CompuPic software to post here. I use a smaller sheet of the same countertop material and the same technique for handguns. Seems to work pretty well at very low cost and little setup bother.
Hope this helps.
John