looking for help with the we hi capa 5.1 dragon

[sgtlexicus1982]

hi there

my we hi capa 5.1 dragon is playing up abit at the moment,while im fireing it it seems to miss fire!!!

im not sure if its the gas ive been using(aim top green gas) or if its someting to do with the double stack system within the mag!!

can anyone help

thanks guys