Knights Armament Company (KAC) SR-15 16 inch upper with URX-4 Rail. Model No. 31962. Comes with box, BCG, charging handle, backup sights, muzzle device.
I bought it used when I lived in Hawaii and didn't shoot it. I don't know if the original owner ever shot it, but I don't think so. It's lubed and had an optic and light mounted previously. I want to free up the cash to finish some other projects.
I live in Spring, but I'm going out of town over Thanksgiving. Not expecting a ton of quick interest, so if you want photos, send me a message on here. I'll reply with my phone number.