cal: .223, semi-auto, mag not included, barrel: 21", barrel stamped "CMP 5.56 NATO 1/7 HBAR", nylon sling, includes manual, sn: SP234709, from Mr. Davis's records: I purchased this rifle from James Gaither on February 23, 1989. I paid $686.25 for the rifle. I purchased this rifle in response to the efforts of anti-gun activists to get the AR 15 outlawed. Colt temporarily took the AR 15 off the market. They brought it back with changes to satisfy those concerns; NOTE: There is a $25 transfer fee per firearm for transfer and/or processing payable to Gun World, whether the firearm is picked up or shipped