Low round count (either 90 or 120, but I don’t remember exactly) upper receiver group from Palmetto State Armory. This is just an extra I have laying around and I don’t need it.
16” nitride 5.56 barrel, 1:7 twist, carbine-length gas system, 13.5” lightweight hex M-LOK free float handguard, A2 flash hider. No bolt carrier group or charging handle included.
PSA sells them for $200-350 + tax and shipping. I’m asking just $150.