[HELP] How do i add new item to my server?

I have tried many ways and readed all the guides about how to add new item to my server but i not succeed yet, i am new at this and i need realy big help.
Ty for any help

what kind of help you need?

because if you say "i need help on an item" we simply reply, what item?

i wanted to add these weapons here [Only registered and activated users can see links. Click Here To Register...] and tried to add them by using steps in this guide [Only registered and activated users can see links. Click Here To Register...]

Thanks for the reply