i recently bought a px4 storm .40 full size. i get to thinking, i might be able to do this. as i have done it with actual magnum research jericho's buy a .45 storm. take the .40 slide assembly, mount it to the .45 frame. ream the barrel on the .40 slide to 10mm. use the .45 mags pinch the lips to take 10mm. voila!! 10mm storm, rotating barrel 10mm? anyone got a .45 and .40 storm to see is the slide fit. i did this on a stailess jericho, i now have a stainless jericho 10mm, although it took a little more than a slide swap, it also took me having to monkey around with the disconnect notches in the .40 slide to match the .45s trigger bow/bar. but the beretta may not need that, it looks like it wont, would that not be one bad ass 10mm? Wanna kill these ads? We can help!