Here is a link for details on the upper: http://aresarmor.com/store/Item/aa_BAupper Brand new, unfired 16" Ares Armor Harpe carbine-length DI gas upper on .223/5.56mm marked Anderson lower with the following components: *Low-Profile gas block *Basic LPK *Magpul Gen2 Front and Rear BUIS *Magpul MOE Stock *Magpul MIAD Pistol Grip *LWRC Nickel-Boron Fire Control Group *Ares Armor Nickel-Boron BCG. *One Gen2 PMAG. I put the lower together myself. First time doing so and I put a small scratch on it by the bolt release. $850 cash for the whole rifle or. . $500 FIRM for the upper alone w/out MBUS set or. . . Mostly cash + Trades accepted: *.223 or 5.56mm brass ammo *9mm brass ammo *CZ pistols in 9mm or 9x18 makarov *Quality flashlights and weapon lights PM for pics. Thank you.