In this guide explains how do you get the 4th and 5th weapon.
To get 4th and 5th...
> Must be play on HARD or more difficult.
> Must be in STORY mode and finished (seen staff roll).
> 1P only if possible.
> Press Pause if there are long speech. To save time.
> Make sure you get the mission before doing requirements.
> You can get 5th without 4th.
> For SW2 characters, you must do REMIX in order to play story mode (and
Survival for some).
I won't add stats for weapons because you can now change them in shop with
Orbs.
Found any mistake? or need to ask.. post on GameFAQ or send e-mail. Enjoy!