A faxon upper reciever with a faxon carbon fiber handguard and a integrally ported faxon barrel. Pictured with a sig Romeo 5 and vortex 3mx magnifier (also have holosun) *Will only sell/trade the Aero lower with the upper* for a bigger deal, otherwise I'll keep it. If you just want a cheap lower, I'd consider separating the pistol fde lower from my 22lr arp. Checkout my other listings. I have a lot of other guns and gear posted.