I need constructive criticism.This is what I will base it off of. The Machine Gun is now an 81-1 Assult Rifle.

I know the Middle top part isn't complete.
I am having great additions to it. I am working on it having a right click to hit people. Sadly I am having trouble. I can only get it to play the hitting animations.
This is a picture of me holding it from the right side.

This is a picture of my custom bullet. This is for the Machine Gun and the Pistol.

This is a picture of me holding it from the front.

This is a picture of what the gun looks like spawned on a brick. No hands when spawned.

This is a picture of me shooting is in first person with my custom gun shell comming out.

Forget about my Baretta. So many pictures already made and such.
Any ideas of more constructive criticism?