A modeling exercise I did last week. Materials are set up for cycles, and also BI, just turn the node-based textures off if you switch back to BI.

Based off of the concept work of Ian Bunting. http://paleblu.deviantart.com/art/Machine-Crossbow-Gunner-270036114

1024x1024 textures - diffuse, spec, and normal. 4256 faces