I have an extra brand new unused stripped upper Cerakoted by Aero in FDE. Would like to trade for a stripped Aero lower. Anodized is ok. I would also be interested in other brands like Mega, Spikes, SSA, CMMG, ect. I am not interested in Anderson or PSA. Cerakoted upper sells for $105 on Aero's website. I would take $100 cash.