Firing indoors, what do I need to know.

[crossgun]

Just a question but why is the AR your primary? In the situation you describe time will be an issue. I think you can deploy your pistol faster than AR. A 1911 with light and laser grips should be able to solve any home invasion problem. I think I would much rather try to gather my family and search my house with a pistol rather than an AR and I have a few short barrels. I also have concerns with most 5.56 and pass throughs.

Can be really tough to work tight house hallways and rooms with a rifle.

[ares]

And ALWAYS consider over-penetration and ricochets. .223 ricochets A LOT if your house is made of bricks, and if you have plywood walls or something similar, it will go through and keep its lethality.
The 1911 is the best choice inside your home, I guess.

[Rhutch]

Really? Very few people have brick interior walls. Most modern construction is drywall on 2x4 studs not the greatest surface for ricochets. As for over penetration .223/5.56mm will go through interior partition walls but then so will just about every caliber that would be able to kill a person. I assume you mean a 1911 in .45, believe me that too will go through interior walls. The best thing is to hit what you're aiming at and get some training to increase your odds of hitting your target.


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[Beat Trash]

This has been covered quite a few times.
Here's the deal:

A few gunshots indoors are not likely to cause permanent hearing damage.
Auditory exclusion does not protect your tissue, so a loud enough noise or lengthy exposure will still cause damage.
The noise from the other guy shooting at you will be damn loud.
A few gunshots indoors may result in ringing of the ears, but you won't be deafened.
A little tinnitus is better than a zip-up bag.

Without trying to sound like a smartass or a simpleton, this pretty much says it all!

[ares]

Really? Very few people have brick interior walls. Most modern construction is drywall on 2x4 studs not the greatest surface for ricochets. As for over penetration .223/5.56mm will go through interior partition walls but then so will just about every caliber that would be able to kill a person. I assume you mean a 1911 in .45, believe me that too will go through interior walls. The best thing is to hit what you're aiming at and get some training to increase your odds of hitting your target.


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It depends in which region you live.
Anyways, of course the .45 will go through one interior wall, but it will stop much faster than the 5,56x45.

[Rifleman_04]

5.56 in defensive loads are less likely to over penetrate due to their tendency to fragment.

[RSWORDS]

5.56 in defensive loads are less likely to over penetrate due to their tendency to fragment.

Is a few layers of sheet rock and 1/2" OSB enough to make it fragment? I would hate to shoot at an intruder to kill the guy next door. How many interior walls plus an exterior wall must a round pass to stop it? I've seen plenty of tests on common hand gun loads on this but none on .223 or 5.56

[6933]

The over penetration myth of the 5.56 has been covered extensively on M4C. A rifle is an excellent choice for HD. I just prefer the SBR route with a 6933. A good first step would be to seek out some training in a shoot house as well as training geared towards HD. A shoot house will really open your eyes.

[vigilant2]

To echo what 6933 said, the overpentration "myth" of .223/5.56mm
has been discussed ad nauseum on M4C. It has even been demonstrated on 2 television gun shows on the Sportsman channel.
They used 9mm, 45ACP, .223/5.56mm and I believe 00buck. The
.223 exhibited the least amount of penetration. If I remember
correctly the test used 3 walls of sheetrock with distance between
each section of drywall.
FWIW, regarding cans,I don't know if this is true but my local Class III dealer whom
I very shortly plan to purchase .22 and 9mm suppressors from
told me that according to BATF " you can't use it in a defensive
role", strictly sportsman/collector usage.

[elia.jon1]

i just found this topic and wanted to add my 2 cents.....

i have shot my 10mm inside my house, now i had it loaded with 200gr hornady which is close to subsonic, i think it would have been louder if it would have been a faster round but....

you dont have as much area for the sonic boom to manifest. the 10 sounded like a pop, this came up on another forum i used to frequent and just like what i said another guy said he nd'ed his 45 in his "gun room" and it was not near as loud as you would think it would be.

the ar will be louder but the pistol in a closed room was actually quieter than shooting it outside, you have lots of soft stuff in your house, couches beds, carpet, and so on that actually absorbs alot of the sound....

i'm not saying you might not think it loud i used to compete in db drag and could have a little hearing damage, if you talk to me i might say huh a time or two according to your voices pitch but.....your home is not a metal covered area at the range, you might be surprised how "not loud" it is.


i'm not trying to argue or say anyone is wrong this is from first hand experience with a few calibers from a pistol. so take from it what you may.....



edited to add: the shoot house will not be carpeted, it will be barren so it is not quite as realistic as your house........for example...drop a good sized book in your garage and not the volume, then do the same thing in your living room, bed room , whatever room and note the differences in pitch and volume