Be Sure to Back up your Files
As of right now 3ds max cant export weapons with light emitters so the blade is just green, hence Toy Light Saber. See the video for what it looks like in-game.
1. Install OpenIV
2. Once Installed Click ON GTA5 for Windows, go to tools, (If you dont see tool bar press F10) ASI Manager and install both ASI loader and OpenIV.ASI, then Press Edit mode
3. LightSaber Goes in this location Grand Theft Auto V\update\x64\dlcpacks\patchday3ng\dlc.rpf\x64\models\cdimages\weapons.rpf\
Hope you Enjoy my mod