In the game trailers yet we only see like 4-5

so Im wondering is there only those?

I believe they said there will be 10 weapons so the can fill up 0-9 on the keyboard. Each weapon will also have multiple ammo types.

so far showed only 8 weapons in all videos. But in an interview to a Spanish website said there will be many more weapons than what we saw so far, so do not worry. There are many weapons in RAGE!