First up, it is nice to hear from other members experiences with their home studio kit building as I also am currently looking into setting up a small studio kit for shooting still life and portraits.
As for comments on the images you provided, they show that you can go a long way without much kit. The pistol in particular looks good to me, and that is even though I'm not really a gun lover. In general, I'd say they are nice pictures, but the devil is there, lurking in the details...
A few examples I could point out. First, the lights appear to be clearly visible as reflections on the shot glass base in a few pictures (first and last for example) and these attract attention away from the subject and make the images a bit weaker. Some images also are a bit canted to the side it seems. Finally, in the first and last image, depth of field makes the bottom of the glass fuzzy, but may be not enough to make it clear if it was intentional or accidental. I'd either go for full blown out of focus at the base or in-focus everywhere.
Worth noting is that the second images makes a good job of leaving the lights reflections out and managing the DoF, although there might have been a bit of an over correction of the canting...
These are just my opinions and reflect what I would try to correct if these images were mine. Feel free to disregard my comments if you don't agree.