KA-BAR for GO

It replaces knives on both sides due to the way the knife models are set up. Sorry :P

How to install:

At the moment of release the beta doesn't support modding directly,
so installation can be a bit tricky and you'll need to edit
pak01_dir.vpk every time Valve/HPE releases a patch that updates that file.
This'll probably change at launch/sometime after launch.

1) unarchive the materials & models folders into
steamapps/common/Counter-Strike Global Offensive/csgo/
2) BACK UP PAK01_DIR.VPK IN CASE YOU SCREW SOMETHING UP!
3) open up pak01_dir.vpk in Notepad++ or some other proper editor
(Regular notepad will probably break your pak01_dir.vpk, so don't use that)
4) Use find & replace to find all instances of knife
and replace those with anything else, say, kniff for ease.
What this does is basically it points the VPK to a file that doesn't exist, 
and forces it to load loose files - ie. new models/textures.
5) Go in game and enjoy!

How to uninstall:

Restore backed-up pak01_dir.vpk. You can delete models/weapons/*_knife*
and models/textures/weapons/Millenia/KABAR, if you so wish.
Not necessary, tho.