The lighting is bad, which is giving you a VERy flat look to the items. The signs should be in or out, not partially in, the bright white of the floor on the left and the white signs heavily detract from the firearms and draw the eye away. Lastly, the focus doesn't look like its on the weapons, making them feel more like an afterthought.
I think side lighting from the right would make a world of difference, but you would need to drop the exposure by a half stop as well. I like where you are going with the idea, but it falls flat on this one.
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