Sold to Outlaw One set of Magpul MBUS back up sights. Picked up a used flat top AR that had these on it. I've ever been much for magpul products so I'll be removing these shortly. They appear to be in great working order and aside for a couple scuffs around the FSP (from adjustment) they're in great shape. Will only sell as a set. asking $55 shipped. Paypal accepted.