Somehow that tip doesn't really help me there's like 80 different weapons mods on there.

Could someone please help me out here?

which one and where can I get it?

I'm not trying to access a server, I open cod (mp) bring down the console with ` and type /demo neuville1

I'm getting this message when I try to open some neuville demo's.

I know I need a client side weapons mod from somewhere but don't know which, any help please?