Welcome to Librarium Online!
I'm at a loss for words. Two hours you say? You have a knack for producing good paint jobs in a very short amount of time- a very nice skill in this game. My only suggestion would be to put a little more detail into the holster bit. Add a little more shading.
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yeah I just noticed that part, looks ok in real life....but thats from natural shading. A few quick highlights wouldn't hurt.