That is bad ass. Much improved. It fits in better with the rest of the picture.
But really, the most important thing is that Fio is holding that firearm with her finger off the trigger. It makes her look like she and her artist know what they are doing. So many artists do not know simple gun safety and it makes them look silly. It warms my heart to see you recognizing those rules.
There is little I can teach you, but I do suggest you use some reference if you want to continue drawing Metal Slug weapons. Here is a good place to start
[link] .
Good luck, Laoyue of the Slug.