
(You need OpenIV in order to access the game files)

C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto V\mods\update\x64\dlcpacks\patchday8ng\dlc.rpf\x64\models\cdimages\weapons.rpf\


How to fix the eotech aiming in first person:
For the special carbine: get its weapon.meta, (C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto V\mods\update\update.rpf\dlc_patch\mpbusiness\common\data\ai\) 
and change the "FirstPersonScopeAttachmentOffset" z value to -0.069350 

For the carbine: same deal but in your vanilla weapons.meta
(C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto V\mods\update\update.rpf\common\data\ai), 
change the "FirstPersonScopeAttachmentOffset" z value -0.0292