UMAREX 40 rounds CO2 Powered Magazine for Legends MP40 CO2 (1 Joule Version)
 
Spare magazine of UMARE Legends MP40 CO2.
280 FPS Version.
Full metal receiver made.
insert 2 pcs of CO2 cartridge in the base, which can shoot around 240 round BBs before it is completey out of gas.
The hex key in the picture is not incuded.