It might serve ok if you are trying to stay with one operating system. Don't try to use it with the 30 round or possibly even the 20 round mag or you may find yourself blocked in the middle of the pump stroke, not to mention leaving some of the skin from your forearm decorating the front lip of the floorplate.
If I'm going to have a home defense gun that looks like a shotgun, operates like a shotgun, holds about the same number of shots as a full length mag shotgun, etc., I would rather have a shotgun.
If I want a .223 I want the AR platform, (or SIG, or Mini 14, etc).
Everyone has their opinions. I hope others will offer theirs.