They should have 9mm and 40 out soon. The box says 45, 9 and 40 . I am not sure what the advantage would be. Recoil is very manageable. A few extra rounds vs a lot of stopping power? I have been looking at the 3.8 inch xdm in 45. It is bigger but uses double stack mags. 7 and 9 rds I think. Hopefully someone will talk me into or out of it.