IMO, leave the 9mm for handguns. 9mm carbines are for fun at the range. Don't get me wrong; can they be used as a home defense tool?.... sure they can, but you can't deny that there are much better options there for home defense. You may find that you will sleep like a baby with a 12 ga Winchester 1300 Defender fully loaded with either Shot n ball or Buck n ball sleeping next to you. Just saying.