This Stoner has been fully upgraded with a barrel chop and rethread, a stock chop, added rail segments, a polar star f2, and pdi barrel. A m249 box mag clip has also been attached and a Mag brand box mag is included. This Stoner works flawlessly and can reach out past 70 yards with ease. If you are interested or have any questions feel free to reach out, Im open to offers but please be reasonable. *no holosun* Buyer pays shipping no trades