This is a great work of art, but there is one problem I see immediately. The shells that are spewing out of the gun would not have the bullet(metal cone at the top) still on them. But over all it's awesome.
also, if it's a rotating cylindrical barrel, as it looks like, then the ornament on the top (dogs head) wouldn't physically be able to be attached to the barrel and the receiver. unless it's not a rotating cylindrical barrel?
haha, but seriously, this is a wicked picture. I really love the colour co-ordination and blurring.