Against multiple attackers 5-8 rounds is not sufficient.
Uhh... in the very rare cases that there are more than 5-8 attackers invadinga house, firing more than a few times is usually still enough to deter almost all invaders. Home invaders come in because they feel the person they are coming after is defenseless in the first place. Besides if you are being invaded by multiple invaders at once that are NOT for some reason scared by a few shotgun rounds being fired then an AR 15 is NOT going to stop them all either. A single person alone defending his house against multiple armed assailants who are not scared by a man firing back is not going to be able to defend his home in that case. The only cases where you aren't going to scared them off is if they are cops or swat. In which case the difference between a shotgun and an AR 15 is now moot as a person being invaded by cops has bigger problems.
As many as it takes. There's no such thing as a guaranteed one shot kill.
Who said anything about KILLING being effective home defense you dimwit. Home defense doesn't rely on killing invaders. Again, as I posted above to Malak, home defense is a STRATEGY. Alarms don't kill invaders, locks don't kill invaders, and bars on windows don't either. The point to home defense is to deter invaders long before you even need to fire a shot in the first place. This is a stupid point to make on your part.
Shorter = easier to maneuver. Heavier guns are not more stable and easier to aim, they just make your arms tired. Especially for women.
You are incorrect here. Shotguns, by the way, can be MUCH shorter than an AR15 unless you practically remove the barrel which reduces any recoil "advantage" an AR 15 had over a shotgun. Heavier guns ARE much more stable and leverage towards a given area. This is why NO ONE fires a pistol in real life one handed and hopes to hit anything with it. Pistols are too light to be accurate with one hand and require two to be more accurate. Heavier guns make it so your muscles are "fidgeting" while you are in a stressful situation. Most people hear an invader in their house and their adrenalin soars through the roof with fear and anxiety. It's natural. Having to worry about being accurate with a gun at close range is the last thing they are worried about. So a shotgun is much more accurate at close quarters than an AR 15. Easier to wield, and hits a bigger area. Plain and simple.
As for weight making you tired, how long do expect a person defending their home to be holding a gun? It's not like a warzone where they'll have it at ready for hours on end. Damn that was a pointless argument you made there.
Good luck using bird shot or sandbags to actually, you know, stop (ie kill) someone that is trying to kill you. Bird shot is NOT lethal enough to use in an HD gun.
AGAIN the point of home defense is not about being lethal. It's about DEFENSE. Which means to make the attacker stop. Sometimes that means killing them, but it is rare it will ever need to resort to that level. If for some reason your alarm didn't stop them, the locks on your door didn't stop them, the motion lights didn't stop them, the sound of your shotgun racking a round didn't stop them, and you firing a shot in their face with bird shot (which is lethal if not immediately so) didn't stop them, then you have bigger problems. An AR 15 isn't going to fair any better by then either. Also the first round you load with bird or sand, and the next you load with someone much more lethal in a shotgun. The point is to DETER the invader in defense away. Yes sometimes that means killing them. 99.9999999999% of the time it does not.
Racking a shotgun gives away your position. If you want to give the intruder a warning shout "I have a gun". Racking a shotgun is not going to make someone magically shit the pants and run away.
Dude you are full of it. Majority of home invaders only invade because they believe their victims to be helpless. By racking a shotgun you let them know that you are not. It may give away your position, but their position shortly after hearing it will one of running the fuck away.
Red DOT and light. So, you know, you can actually aim in the dark? Red dots are quicker than ironsights.
They're easier to mount on ARs.
Talking about giving your position away with one statement and then make this. A light is going to give your position away faster than sound which can echo and bounce off walls in a house which may not actually give your position away. Also you can mount those things on any shotgun as well if you desire. Not that they are needed for a shotgun. And no, they are not easier to mount on AR's compared to shotguns. For some shotguns they are easier to mount, but it depends on the shotgun you get.
Shotguns with buckshot have a effective range of about 30 yards. I'd rather have the extra range and accuracy and not need it than not have it and need it.
Who the hell has a room in their house or hallway over 30 yards???? Where not talking about getting up on a bell tower and taking people out with a gun. In which case an AR 15 is much more suitable for that. We are talking about DEFENDING A HOME. The average room of a house is 3-5 yards long. Crimeny. You don't need to shoot any further than that.
Now if you have rooms in your house over 30 yards long you probably are living in a really big mansion. If you have tons of people invading that, then you might want to consider investing in GUARDS with guns at that point instead of trying to defend your home by yourself.
Your arguments boil down to "I only need 1 round and the sound of my fuddtastic pump shotgun racking for HD so the gun that is obviously superior sux lol"
Uh no. Your entire set of arguments of why an AR 15 is stupid as I've plainly pointed out. Anyone with logic can see that as well. Anything further from you is pure trolling.
I think you are living in some la la fantasy land where you think zombies are real and are actually about to invade your home tonight. I'll give you the benefit of the doubt and state that if zombies ever did invade your house than an AR 15 might be better than a shotgun. But in reality you are full of it.