Wow man, this looks awesome! Once again, you haven't let me down.
Well, this is pretty cool. I like how you highlighted, but I think you should have done more shading. I think the handle looks to dark and flat. The mag release is too dark, it's hard to tell what it is. I think you could have left out the symbol on the hand guard, but it's alright. It's just that you have two symbols on this that are basically the same so viewers might get distracted. I love what you did with the grips, though. Same with the charging handle. Everything else is just perfect. Overall, this is an other great concept from you.