Was talking w/ Massad yesterday at IDPA and he has just submitted a write-up for the new MA1's to a mag (not sure i should say which one), and he mentioned that for a holster he just used an Aker gunleather rig for a G30 that he had. Said it worked great FWIW
You should definitely say which one so we can keep a lookout for it .......what was Massad doing in Florida? Was this a regional IDPA?
Don't just run out and purchase Glock 30 leather. I tried 3 different custom made holsters for the G30 with my M40A1. The gun did not fit in any of them. It is close but the curve of the trigger guard prevented a decent draw. These are very tightly molded holsters so I can see where a looser production holster MAY fit. Strangely enough I have on older Sparks IWB for a SIG P220 and my A! fits this one pretty well.