This mod by DarthErebus gives you HK-47's personal blaster.
ReadMe- Hk-47's Personal Blaster
This gives you Hk-47's Personal Blaster. +5 Unstoppable damage to driods. Damage bonus of +7-25 Unstoppable. Can only be used by Hk-47.
Simply put the w_blaste_hk.uti file into your override file, and enjoy.
How to get it ingame: Activate your cheats by going
to C:Program FilesLucasArtsSWKotOR2. Then go to swkotor2. Once you are in swkotor2 go under [Game Options] and type in : EnableCheats=1. This will enable all cheats in game. Simply press ~ ingame and you have the cheat console. To get this item, press ~ and type in giveitem w_blaste_hk
This can be used anywhere as long as credit is given.