edit the gunspec.txt file for the weapons and use these commands to add ironsights: simplezoomx, simplezoomy, simplezoomspeed, simplezoomacc, simplezoommod
i haven't messed around with these commands in a while but i can tell you what each one of them does, simplezoomx and y adjust the X and Y coordinates for the gun when player is aiming down the sights, simplezoomspeed adjusts the player speed when aiming down the sights, simplezoomacc adjusts the accuracy of the weapon when aiming down the sights, and simplezoommod turns on the ironsights i think?
there's a few custom ironsight scripts for model pack 5 weapons, check them out here: https://forum.thegamecreators.com/thread/150142
but if you want ironsights for the other weapons that aren't on that thread, you'll have to make them yourself.
hi, i'm a random guy who's making random games with random game engines for random reasons