Aero Precision EP-9 Atlas S-One 9x19mm upper.  This upper has been barely used and is 99% condition.  16in with 15in hand guard.  Anodized black.  A2 muzzle device.  1:10 4150 CrMoV barrel.  Does not include BCM or charging handle.  Last round hold open.  Great addition to carry with any 9mm pistol.  For sale as is.  No trade offers.  Price as losted.  Free shipping.  Can ship to private address.  Just add your specific AR9 lower.