2-19 ROUND MAGAZINES, WITH CO2 ADAPTER AND CO2 STOCK, SMALL ACCY KIT, EXTRA O RINGS, ALLEN KEY AND LUBE, 2 TWIN PACKS OF 88G CO2 CARTRIDGES , FULLY PNEUMATIC OPERATION, DURABLE MAGNESIUM RECEIVER, FLIP UP SIGHTS, GAS ON/OFF SWITCH, 2 POSITION SELECTOR