How can you make a gun with ammo GUI?

I Am hopeing to make my own gun business at roblox, And I wanted to know how you can make a gun with Damaging ammo. And how do you make a team with Anti-TK? Thanks

I've tried using the free =[SPETSNAZ]= AK47's scripts with a FM free model gui, then edited the gui to have my own look. It works well.