Years ago some centerfire calibers used to be available in both Short and Long versions, just like the .22 rimfire came in both Short and Long versions. But as far as I know there has never been a .45 Short Colt and .45 Long Colt. There's only .45 Colt. If you call it a .45 Long Colt or .45 LC, you're calling it by the wrong name. Just because some gun and ammo companies started calling it that too doesn't make them right. There's no such thing as a muzzle BREAK that screws onto a gun barrel either. I see them for sale all the time, but that still doesn't make it right.