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I don't know how to feel after that. I knew that plywood and drywall wouldn't stop anything but to see that sandbag bunker getting blown into pieces by the shoulder fired rocket is unnerving! I may have to take, err, uh, "cover" in something like that.
You know, I guess I understood this concept early on because I remember one BAD fight with a neighbor because we were playing "cops n robbers" and he dodged behind a shrubbery and I said "bang" and he said "I was safe behind that bush" and I said "a bush wouldn't stop a gun" and the fistfight ensued (hey, I was all of 7 years old).
I'm reminded of an incident in Viet Nam. A Marine chucked a grenade into a hootch and flattened himself against the wall in the approved Parris Island manner.
It was a grass hootch.
And as I have said many times, when the shooting starts, people tend to hide behind things (done it myself.) You need penetration in a combat weapon, the more penetration, the better.
Rule #1 is to be where they ain't shooting.
Failing that, rule #2 is to be behind the biggest most dense object you can find.
Rule #2a- If said object won't stop a bullet, hopefully it will at least conceal your exact location. Then at least they cannot aim directly at you.
Modern building materials are surprisingly transparent to all manner of weaponry. IIRC, the RPG-7 can penetrate 1.5 meters of concrete and half a meter of RHA.
I'd seen that some time ago, but forgotten about it. Thanks for posting.
In his book "The Ultimate Sniper" Plaster gives a chart detailing some the penetration capabilities of different rounds. The 50 BMG can do some pretty interesting things. On our informal home tests, we found that partially decomposed granite (which is common here in the Northwest) stops .50 BMG AP pretty well, compared to other things you might pick up at, say, a machinsts auction. We were picking the steel cores out of the large rocks with our hands, or prying them out with small knives. But that was using a .50 BMG "Carbine". The M2 will give better velocity.
That reminds me of my son, when he was about 6, busting up basketball sized chunks of basalt with a carbine-length .30-30 Winchester model of 1894. Ah, freedom!
What if you put sandbags between the sheetrock rather than loose gravel? It would still leak, but not as badly and sandbags are a reasonable defense against most man-portable firearms.
Don't know how well it would work for insulation though.
To build a proper sandbag wall, only fill the sandbags half as full as normal. Use a 2X12, about three feet long, to pound the sandbags, forcing them to fill all the space in each layer, leaving no cracks or gaps for bullets to pass through.
You can also mix a little cement with your sand to bind it.
Something soft like sand / mud will stop more projectiles than something hard like concrete. Concrete tends to frament and create secondary missles.
They avoided showing any test of frag grenades from outside the building. That is because they tend to have very limited penetration and odd disbursal patterns.
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