I've been shooting the crap out of my g20 with a .40 conversion. Ive also got a 23 with a 9mm conversion. As you can see I'm into versatility. I saw that some guys have been converting .45's to 10mm's. I know a 40 is just a shorter 10. Do you guys know of anybody making a 45-.40 conversion? Ya I know I'll need to use my 10mm mags. Wanna kill these ads? We can help!