[Maxx702]

I could see carrying the G30 in the breast pocket of a heavy coat like the OP describes.

I would suggest looking at this.
I use the same holster for my summer carry 38 snubby.
It has a nice thumb push mechanism that allows you to easily draw the gun without the holster.
http://www.fist-holsters.com/novoer...h-159i-160l-167-3-192-224-231-243-detail.html