Install:
OPen OpenIV
go to GTA V > mods > update > x64 > dlcpacks > patchday8ng > dlc.rpf > x64 > models > cdimages > weapons.rpf
replace w_ar_carbinerifle files.
Features:
Animated
fixed attachment position
real textures
Bugs: None found yet.
Credits:
matilda
M4 Model,Textures-Twinkie