I have ton of ar triggers and this is one of my favorites - Rise Armament OPMOD Hex-C AR-15/AR-10 Enhanced Rifle Trigger

Just make sure you are using this for the correct application. There is virtually no take up and very clean break with a super short reset. I'm using in a fun hunting 223, precision type shooting application. I'm not sure I would use in a truck gun or high stress combat situation. I also have RA 535 in 6.8 spc, I may like this trigger better. But they are both great triggers. I build a lot of ARs and don't normally use the same trigger twice (I want to try all of them). This is the rare exception. I'm ordering another one for an 8.6 build.