Colt AR-15 SP1. Not sure of its age. The finish looks like stainless so what all I have read makes this a rare find. There are 5 magazines. 4 are factory original 20 round. I did fire it today 12-21-25, all 20 circulated perfectly without any jams. See pics,asking 5,500.00 for its rarity but will will letter to offers. No interested in trades. text Matt for any questions. 614-348fourfourzero four