thank all for the feedback @ Avo: & @ THEMUD: this pixel was hidden and I just do not see it, and I thought let him there to resemble that little piece in the barrel.
The shape and shades look well done in the buy image, and both the drop & in-hand image look okay as well. Except that I agree with CY regard the magazine of this weapon. You should fix that in the future.
But overall of this, this skin is decent and worth staying on File Archive + here I shall give my like.