aero receiver set with a 8.5 inch KAK 5.56 barrel Sig romeo 5 gen2 red dot. Anderson lower parts, Cantilever irons and a Magpul grip. Have a forward blast diffuser or the standard birdcage flash hider (not the mount pictured) Shoots amazing and is a great suppressor host Asking $725 cash or trade for an ar-9. Will come with one 30 round mag