It seems she is from South Carolina. That is where some items went when we sold, so she must be selling off some "spoils" of war. lol. May I say: I have no idea where those .380 barrels came from. You would have to ask the seller that one. Good Luck in your search for a .380 barrel and KEEP IN MIND You will also need a different slide (an R380 Slide to be exact!) as the extractor is larger for the 380 over the 9mm and that WILL NOT FIT in the R9 9mm slide! The barrel will fit, it just will not work properly. It seems she left that part out! You will also need a different recoil spring setup and an ejector for the rear of the frame. It's not as easy a switch as you may think! Then you need to find a Rohrbaugh R380 Magazine for it to boot. Like I said: Good Luck with that. Can it be done using your existing R9 9mm pistol? Yes, it can. . . . but you must have all of the correct parts first to begin the transformation from 9mm to .380 acp. ;-)