This comes with certificate of authenticity, only 3000 made for sale world wide. Comes with 6 mid caps and a drum mag adapter. Includes battery space extension so you can fit even a 11.1 1100mah battery. Easy change spring for changing from indoor to outdoor. If you’d like to purchase, let’s use an alternative app or you can pay the fees through hop up. Free shipping in the US. 500 non hop up app payment