An AR15 with a bump stock and green tip ammunition is even better.
Why “High Powered” 5.56 NATO/.223 AR-15 Ammo is Safer For Home Defense (FBI overpenetration testing)
http://preparedgunowners.com/2016/07/14/why-high-powered-5-56-nato-223-ar-15-ammo-is-safer-for-home-defense-fbi-overpenetration-testing/
7 shot shotgun definately better against 7 attackers. Dumb ass. Did you read about this situation being a perfect example of the need for high capacity magazine? So 7 people are offensively attacking you and you think the racking sound of a shotgun is the “big scary response” needed. WOW. I would go with firepower with 7 on 2 tactics when I’m the 2 but all means you go with the loud but limited loader.
AR round fragment better than other non-shotgun options like pistol-caliber carbines and even some pistols. Specialized rounds like the Hornady TAP round are basically varmint rounds with a cannelure, designed to disintegrate on quickly on impact.
Racking the shotgun announces:
1. Exactly where you are.
2. That you either keep your arm unloaded or you just threw away one round.
3. That you weren’t serious and you didn’t feel threatened enough to open fire, an important legal element in many states.
Racking a round is merely radar and makes it easier for the intruder to find you.
Unless you have a Benelli Semi-Auto filled with sabots...to literally cut em down...
If they’re inside your home, all questions & warnings are complete. They’ve deliberately, with consideration & effort, breached your social & physical & legal boundaries. There is no need to “warn” them (they know the risks), there is no reason to keep a chamber empty just so you can waste time “warning” someone by filling it (when you may already need that round chambered), they have likely already prepared to confront you so you’re “warning” them of what they’re ready for.
.223 / 5.56 is notoriously unstable, likely to start tumbling & lose energy fast when having struck the first object - it’s not going to “pierce the walls of a dozen trailers”. Overpenetration has been well-addressed for this caliber, and is proven better than most.
A major point of using a carbine is accuracy & maneuverability: increasing odds of hitting the intended target, and so reducing other casualties.
Shotguns, however, have: limited capacity (don’t miss!), deep penetration (for some ammo), and the very same (& debatable) “spread” people tout as improving hit odds also improve odds others will be hit.
Sir, sorry but the over-penetration belief is just not true- unless you have some unusual 556 ammo.
Fact is, the standard fodder of 55 grain FMJ from a carbine fragments into many pieces, perhaps two of which weigh more than 10 -15 grains. A soft shatters even more completely, a varmint round after all.
Even heavy 77/75 grain offerings are very good at coming apart after minor contact with stuff like drywall and frame construction.
I suppose the sound of a pump shotgun is awe-inspiring, but so would the very well known and unique sound of the bolt-carrier group of an AR closing a round into the chamber- but that is just theatrics.
it is very well known that buckshot loadings of #4 through 000 penetrate interior walls very well- and of course, one must aim carefully with either- at conversational distances, the 12 ga and 556 need to actually be pointed at and hit the center of something IoT work.
I suggest perusing the net and seeking facts regarding the 556 and 12 buck in home defense scenarios.
Granted, one solid hit with either should be a fight-stopper- both deliver upwards of 1300-1500 ft-lbs of either individual or combined projectile energy.
Google 556 wounds and you will be amazed- the little 556 really works.
The 556 carbine weighing in at 6 lbs , 7 loaded with a 30 rnd mag has virtually no recoil and follow-up is easy, compared to the recoil of the 6-7 lb 12 ga pump loaded with 4-7 2 3/4 in rounds.
Don’t get me wrong, I would pick up either if needed ( and have indeed), nor would I want to be hit with either.
Another given- the 556 carbine with dot optics is useful from 0- 200m, while the 12 ga loaded with buck is useful to 50 m..... You never know.
All stated, I carry a handgun starting with a “.4X” to get to my carbine.
Concluding, the guy who fired 30+ 556 rounds needs training.... both in marksmanship, tactics and fire discipline....