My Weapon Spritesheet - Looking for critics and rating of different styles

I'm creating items spritesheet for my Unity game that will use grid-based inventory. But I can't decide which graphic style should I use. On one hand is low-res pixel stuff, on the user is the same but in x2 scale.
Making it x2 will take more work and final result looks more blend.
And x1 is way too small and can't display all the design elements. Player can have hard time checking is there a magazine inserted in rifle.

x1 Legacy





x2 Experimental