9mm magazine slides right into the jhp 45 mag with a spacer on bottom to get the 9mm mag at the right height . Barrel is from an Uzzi. I machined jhp barrel and breach block combo to accept the 9mm barrel. Pinned and loctited so its solid. Machined slide to lighten it so 9mm would cycle it weight wise and put a softer recoil spring in. Did this 10+ years ago but thats what I remember doing. I can convert it back into a stock jhp 45 as I have all the stock parts off original gun. I bought a 2nd slide and barrel and misc jhp parts off gun broker from tare parts guns.Eh? How'd you do that?
I just picked up a cheap CF380 I may try and convert to a 22 long. when time permits.