Keep the BBs flying with a spare magazine for your Legends M1A1 .177 caliber airgun. This magazine holds 30 .177 caliber steel BBs and two 12 gram CO2 cartridges, just like the one that came with the M1A1. A new Allen key for the CO2 screw also comes with the magazine.Features :Fits Legends M1A1 Full Auto BB GunHolds (30) .177 Caliber Steel BBs2X 12Gram CO2 Housed in the MagazineCO2 Screw Key Included