Nice concept. I don't like the red plastic background... it really takes my attention away from the subject. Also the sharpness/detail on the revolver and buckle seem a bit lacking.
You have, at least, presumed some level of ability in the voters to work out what the 'six' is here; I'm betting you'll have underestimated the literalness of some assessors minds though. For myself, I find this a fairly bland still-life: lacking fine detail, a lumpy composition, and unsuccessful choice of colour combinations - that red background makes it hard for the real tones and quality of the leather to stand out.
Snapshotish- I really want to see that six shooter to fully get this photo. The red plastic defintely doesn't work with the harsh lighting used. it creates many light parts which distracts the eyes and the focus.
I think this would work better with a different background. You have nice rich colors in the leather and metals and the red plastic or tissue detracts from that "old" and natural feel. Rough wood would be my choice, or a dark fabric.