Go easy on options and accessories, i.e. pistol grip forearms are a glam accessory. They will make you less accurate by causing you to cant the rifle left or right when shooting freehand and prevent you from assuming a good prone position in many instances because the grip will get in they way.
What do you want the AR to be good at?
For close quarters to mid range, day or night, this is my final setup that served me well.
EOTech hologram, took a lot of abuse and held its zero during: daily use, in and out of the truck and banging through buildings.
Triggers are a touchy thing to mess with and depends on how you plan to use the rifle. If its going to be a range gun, your preference might tell you to lighten / shorten trigger pull. If you plan on using it for what it was built for, chances are the stock trigger doesn’t need to be messed with.
Add a Surefire light, go light weight and ensure its mounted on the forearm in a way that doesn’t obstruct your natural hand placement or get in the way when shooting from the prone. Get a light with a pressure switch that mounts on the forearm. You don’t want to have to mess with removing your hand from a shooting position to turn the light on or off.
For close quarters to mid range, day or night, that’s it. Light weight, reliable, accurate.