This is probably my best creation. I was trying to build one with no success. My friend and I were trying to build a lego Hoth thing based upon the BF2 map. I looked at one from the Lego catalog and I saw that they use slanted pieces. So I did that.
Cool, I like the shape. If I were you I would add smooth pieces onto the side. It would give the turret a snow effect on the top with the bumps. Could you check out some of my creations?