This looks very good. I would like to see the stock so I can tell how much work you did. The snow looks good, but I can't tell if that is the stock or an effect. The C4D doesn't seem to follow the flow of the sig, though... the flow seems to me to follow the line of the top of the upper handle on the gun. The lighting is excellent, and blending (if its not a stock) is also very good. Overall, very nice work. Edit: I forgot to mention that I like the version without text better.
In that case, this sig is fantastic. The blending you have between the render and the background is great and the snow effect(s) are very convincing. I really was thinking this was a stock with a C4D, thats how good the blending and snow looks.
Very nice work! It lacks distinct flow, although I think some is hidden in there somewhere, and some of the effects are a bit sharp. Not a lot of depth, but it works very well. Gotta love that Clarion. Thumbs up.