It's like, the cross section between hyper-brutal honesty and the "have it your way, special snowflake" is right here in this topic. On one hand,
Will those also be poorly made?
Was probably not a necessary comment (although it was still pretty funny).
But on the other hand, people do need to be told when/if there are issues with their model, to prevent a massive influx of not-so-good models.
So, here's my advice of Invisible:
The whole of the gun
below the golden part looks really good, I'm digging the trigger guard and the shape of the handle. Except, the curve on the back of the handle is a bit high poly, so I would start merging some verticies together. Also, I'd say you want to duplicate the handle bit and make it a bit wider, sort of like
this, so that the part that you have is still there but there is also a duplicate that is shorter and thinner but still wider. :D
Now, the whole gold part needs to be redone/changed. Also, the barrel should be octagonal or hexagonal, instead of being a perfect circle. :) The hammer thing at the back is uneven in thickness, so I'd want to fix that up as well.
As far as your render goes, I'd say either ditch the ambient occlusion or fix it so that it isn't so damn grainy. I'd add more light, but before that I'd get rid of the shiny texture on the gun, in blockland everything is generally matte or else it looks kinda bad.
Altogether, the bottom half looks pretty good, and the top bit needs more work. I don't think that what Ben said was really necessary (I chuckled at your expense though :o), but I guess we need someone to discourage people around here.