IMO the 12 gauge is the HD tool. I've grown up around guns and have my share of shooting experience. However, I've rubbed my two brain cells together and called it a think tank session about what will likely happen if my home is invaded. Adrenalin -nerves- uncontrollable fine motor skills . I don't want to depend on accuracy, but like many others have stated ..hopefully utilize a safe shooting direction. Imagining shooting any gun in confines of a house, first shot will institute a deafening ringing I'm imagining. so if you don't get him first volley..you ain't gonna hear him breathing around the corner like in the movies. Secondly, if at night, I'm imagining a flash or flashes from either or both sides that causes the eyes not to be honing in the ten ring exactly after the first flash from any barrel.
So I've decided my best advantage is sticking with a Stevens pump 12 gauge. They make a Ithaca copy that bottom ejects, so empty shells won't be deflecting off my walls back in my face. It's short and can be managed in hallways IMO. It's heavy with a real metal reciever (not aluminum) so it's a hell of a club if it came to that. Sling swivel mounts standard. It's low cost. I'm a revolver/handgun collector, and in my home the pistols are for backup..because in a true gunfight, as somebody already said... Handguns suck. They knew this in the old west. Two guys can shoot each other to death inside a house giving and taking rounds, but not as likely handgun to shotgun. A handgun shot that comes so close to put holes in clothing but miss.. Well.. It ain't horse shoes..close don't count. I want something covering a pie plate sized target minimum at rooms length. A shotgun has the capability of eliminating two threats stand close to each other where it would require two skilled/well placed shots from a handgun. Watch the youtube video of the shoutout between the two pair of experienced pistol guys teamed one pair against the other, shooting laser equipped guns/ wearing sensors in a roped off close quarters "western gunfight". When someone is shooting back and the human reactions in the body take over while trying to aim..well .. The floor is about the only thing most of us could hit accurately. Accurate aiming becomes a sad function. . But I digress. When they make a handgun round that penetrates through a perp, and a little parachute deploys bringing the round safely to a halt, that will be the ticket for close quarters home defense when the smiley good guys are my kids. Just my two cents before taxes.. But hey. Im telling ya.