im looking to start a project soon that consists of a MAC-10 or sterling SMG converted to 45acp and with a short integrally suppressed barrel, this is what id prefer for home defense.. why? lighter than even most 5.56 rifles, more compact and easier to handle, 45ACP will do more damage than say most 5.56 rounds which can ice-pick straight through a target doing little damage, and it loses zero energy switching to subsonic, have to wake up in the middle of the night and shoot something, it would be nice not to blow my ear drums, ya know?