kodb wrote:For inside home defense with dependents on site, I would avoid shotguns for the most part. Most shotgun projos and just about all pistol rounds will perforate (not penetrate) standard construction walls. In this application 223/5.56 makes good sense. Addtiionally, shotgun followup shots (particulalry in 12g) are harder than using a rifle/carbine. So long as your AR-15 rifle stays appropriately clean and WELL lubricated, that type of carbine with attached white light and some type of optical sight system is just about optimal for most urban/suburban dwellings.
Since I live in the country and have the luxury of not needing to worry about overpenetration issues for the most part, I use M1 Garands in a similar format and M1 carbines in a similar format.
Agreed. .223/556 would be and is my choice. If concerned about penetration, check out the fragmenting rounds. Mag capacity, low recoil and stay on target and optics all add to a win. .223 rounds are cheap. I. Keep a box of a 1000 on stripper clips on hand for work and home. Don't get me wrong, I have both AR and shot gun in my work truck. At times I grab the shot gun over the AR. The shot gun is a devastating weapon. The odds get better for your with mag capacity.