Adam Arms P2 Piston Upper for AR-15

Brand new, never used, Adam Arms P2 16" Piston Upper. If you don't the value of a piston upper for the AR, it makes it much, much more reliable (and also burns cooler) than the traditional direct impingment setups. This is why special ops and USMC infantry use piston operated M4s. This brand and model have nothing but good reviews online.

I purhcased some back-up sites (in pictures) that I'll include.