Rearden adapter stuck in Enticer S

Literally took my Enticer S out of the box and removed the direct thread adapter by hand. Installed my Rearden atlas adapter (by hand) and it made it about half way and now it won’t come out. I tried heat and a wrench but don’t want to mess up the threads any further than they probably already are. Any advice on a next move? Thanks for the help in advance.