It is carried under what ever shirt I might be wearing. I reach in under ,grip it and pull straight down still holding level. I have seen some made that point the gun straight up, not for me... The ones that are level or tipped with the but end down a few degrees are what I use.
I had a Grandfather Oak I ended up giving to a friend and another one made by a board member . I only use this carry method as a backup (normally in warm weather ) and have other means for other guns/holsters as seasonal clothing allows. A smartcarry or IWB and a neck holster allows for double carry in shorts an a tee shirt.
I believe in back up magazine carry , I just chose to carry them in a back up gun , YMMV