This option will restore the vanilla Hawk & Little Pistols green tacital sight markers for the iron sights! 

To install, simply use OpenIV (with a mods folder active) in "Edit Mode" and navigate to: Grand Theft Auto V \ mods \ update \ x64 \ dlcpacks \ vf_glock \ vf_glock \ dlc.rpf \ x64 \ models \ cdimages \ weapons.rpf \
and while still being in Edit Mode, simply replace the files "w_pi_pistol.ytd" and "w_pi_pistol_luxe.ytd" with the ones from this folder.