I've got 2 of these little pistols. I'm not sure if what you want to have done is possible but I'm not a gunsmith. You might call Rusty, he is the guy that was at Autauga that developed the pistol for them. He may be able to tell you if it is possible & who can do it. Heard from him a few months ago that he was negotiating with another manufacturer to sell the design so it may be in production again one day.
The last number I have for him is 334-971-1308, believe that is the number for Autauga Rifle.