Instruction: 
1. You need to install Civilian's G28 first and install it under his instruction as written in his file. Link: https://www.gta5-mods.com/weapons/hk-g28-eft-replace-modular


2. Drag and Drop

For Body + Stock + Magazine: 

GTA V > mods > update > x64 > dlcpacks > mpchristmas2017 > dlc.rpf > x64 > models > cdimages > weapons.rpf
*NOTE: I retextured the TRANSPARENT magazine, not the other ones. You need to use the transparent one 

For the Suppressor:  

GTA V > mods > update > x64 > dlcpacks > mpgunrunning > dlc.rpf > x64 > models > cdimages > weapons.rpf


For the Scope 

GTA V > mods > update > x64 > dlcpacks > patchday8ng > dlc.rpf > x64 > models > cdimages > weapons.rpf
