https://infitech.se/en/accessories/fixed-stock-adapter-for-ruger-pc-carbine-chassis/ Cute. Unfortunately, in the U.S. this can only be used if you make your pistol into SBR.
@valleyforge It is my understanding that the actual condition is to have the receiver registered as a rifle. If you have a pistol receiver, then adding a 16" barrel isn't making it a rifle and you still cannot add a stock.
@gat That might technically be true but I don't know how that would be enforced
