Hi I was tired of waiting for G&G so I made an adapter for their drum that works with Maxxx hop up and stockYou need G&G type 64 drum G-08-186

Depending on quality of print You might need do some paper sanding of the edges and smoothing flat areas as it is very thight fit.you do not need to use 2 screwes inside the drum but you can I made mode meat that you can drill into if you want.You need bb stopper and spring from oem adapter too.I recommend printing it in ABS