I'm not sure if CS2D is ready for semi-photorealistic(since it's a bit cartoon pixel-art-ish) skins.
Maybe smoothen the places where the shadings collide. The grip especially.
@ Gajos: Yes, just because people repeat something after someone else has said it, makes him a noob. It is big, but the in-game model in TF2 isn't small either.
The skins is big.
It scale is incorrect for size of cs2d player.
Shadow and glare of metal is oriented in the one direction ... it does not always look good.
And I do not like the pistol grip - add more detail there/on it.