Alright, thanks for the feedback!
I reworked the arms, but instead made the other one smaller not the left one bigger, as I didn't want him to be too bulky. Also redid the weapon based on his actual gun. While searching for the gun, I noticed he has a tail, so duh.
Based on the feedback from Ambivorous on the pixelation slack group, I also redid the leg position, to face more to the camera. That way it's a more natural pose, as i tried to stand in his previous pose IRL, but it was extremely uncomfortable.
I also tried redoing the lightning so it is more from top-left, not sure about it though.