HOW TO INSTALL:
To Install simply run openIV and navigate to:

E:\Program Files\GTA_5\Grand Theft Auto V\update\x64\dlcpacks\patchday3ng\dlc.rpf\x64\models\cdimages\weapons.rpf\

and replace the 'w_ar_railgun_hi' with the 'w_ar_railgun_hi' with the files contained within this download!

THANKS AGAIN GUYS!

f0rest