I bought a rifle recently essentially for the upper. This trigger was in the lower and I have no need for it. It’s a drop in, cassette type trigger with the flat face. They sell these for $100.
https://palmettostatearmory.com/psa-custom-ar-3-5-lbs-match-grade-drop-in-trigger-flat-116055.html
$65- Free Shipping CONUS
Will take Paypal or a check.