Aero Precision 16" S-One upper (pre-owned)

Pre-owned in good condition. 16" upper built with Aero M4E1 upper in Kodiak Brown anodize, Aero S-One Mlok handguard in Burnt Bronze anodize, Aero low profile gas block and gas tube. The barrel is marked "5.56 Nato 1/8" towards the muzzle but has no other marking. I assume it is also Aero, but don't know for certain. There are a couple scratches on the Mlok section of the rear near the gas block on the right side of the handguard (see pic). Includes standard A2 flash hider.