If you're using PLA, sure. You might as well be making your suit out of cardboard. But if you're using polycarbonate, that's what most "bulletproof windows" have been made of for years.
Of course, because a material can be fashioned into something bulletproof doesn't mean everything made of that material is bulletproof. My confidence in anything made by a hobbyist wouldn't be very high.
Real body armor is built by a repeatable manufacturing process, and then repeatedly tested so that you understand how much confidence you can have in it stopping the first bullet of a given type, then the second and so on. You might get lucky with a demo of your one-off printed armor, but then again people have reported lucky instances of bibles stopping bullets. It's classic sample bias; when the bullet tears through the bible like it's not there nobody tells *that* tale.
PC needs to be 25+mm thick to even begin to be bullet resistant (there really is no "bullet proof" stuff, a 50 BMG or.338 Lapua will eat bullet proof glass for lunch) - and also requires lamination layers (mylar or equivalent) to hold the shattered pieces of PC together. And that will stop up to normal load ball 9mm. Want.357 or.44 magnum resistance, or light rifle armor? You're talking 4-5 laminations, total thickness around 80-90mm. That becomes extremely bulky and unwieldy unless it's in a fixed-position application. Like on a vehicle.
Yeah, I was going to make those points too. "Bulletproof" polycarbonate windows are inches thick and laminated to prevent crack propagation. And what'll stop a.22 handgun round won't necessarily stop a.22 rifle round, or the second handgun round for that matter.
But it's not out of the question for something that is 3D printed to stop some bullets, some of the time. You can print in steel, even. They use laser sintering. That might have some interesting properties.
But it's not out of the question for something that is 3D printed to stop some bullets, some of the time. You can print in steel, even. They use laser sintering.
There's also been 3D printing in some very durable nickel alloys, which would be capable of holding up to higher pressures and temperatures than steel.
(there really is no "bullet proof" stuff, a 50 BMG or.338 Lapua will eat bullet proof glass for lunch)
I've seen YouTube videos that show a 12 gauge slug will defeat most "bulletproof" glass as well. I've gained a new respect for shotguns since seeing that demonstrated. The range from a shotgun might be rather pathetic but up close they can do some real damage.
A.338 Lapua projectile will have a mass of about 1/2 ounce, but a 12 gauge slug will weigh in at twice that. The rifle round might have a bit more energy but the soft lead in a slug, as opposed to the more durable brass or copper needed for a rifle
The 338 Lapua has about twice the velocity of the 12 GA slug, and weighs in around 250 grains - so it'll have about 2.4 times the energy of the 12 GA slug. And it also has a MUCH smaller cross section, about 20% - so it'll have close to 11 times the PSI imparted on the glass. And PSI is what defeats materials. So the Lapua is MUCH more devastating when it comes to solid materials, as compared to a 12 GA slug.
As far as spread of a shotgun with 00 buck, you'd be surprised. Even at 10 yards [theboxotruth.com], you only have
The 338 Lapua has about twice the velocity of the 12 GA slug, and weighs in around 250 grains - so it'll have about 2.4 times the energy of the 12 GA slug. And it also has a MUCH smaller cross section, about 20% - so it'll have close to 11 times the PSI imparted on the glass. And PSI is what defeats materials. So the Lapua is MUCH more devastating when it comes to solid materials, as compared to a 12 GA slug.
I understand that. What we see with some real world testing is just how effective a 12 gauge slug is against bullet resistant glass. Testing done on the same web site you linked to. https://www.theboxotruth.com/t... [theboxotruth.com]
As far as spread of a shotgun with 00 buck, you'd be surprised. Even at 10 yards, you only have a 10 inch spread.
That's going to be more than enough of a spread for buckshot to no longer be able to defeat bullet resistant glass. For this to work the muzzle would likely have to be inches from the glass. As you point out it's the PSI that will defeat the glass, and if those pellets are spread out enough t
The slug in the "test" went into glass shot a few times before, so I wouldn't take that as "proof" of how it directly compares. Certainly the same is to be said for the.45-70 that was last. It is a hard hitter, but not a glass shatterer. They should have had two panes of the bulletproof glass and repeated the test in reverse order. I expect the glass would have held up in reverse order until a 7.62 or 5.56, depending on what hit where.
Another note is that most ratings are for a single hit, and repeate
Either it came from a 3D printer... (Score:0, Troll)
Choose one, morons.
Re:Either it came from a 3D printer... (Score:3, Interesting)
If you're using PLA, sure. You might as well be making your suit out of cardboard. But if you're using polycarbonate, that's what most "bulletproof windows" have been made of for years.
Of course, because a material can be fashioned into something bulletproof doesn't mean everything made of that material is bulletproof. My confidence in anything made by a hobbyist wouldn't be very high.
Real body armor is built by a repeatable manufacturing process, and then repeatedly tested so that you understand how much confidence you can have in it stopping the first bullet of a given type, then the second and so on. You might get lucky with a demo of your one-off printed armor, but then again people have reported lucky instances of bibles stopping bullets. It's classic sample bias; when the bullet tears through the bible like it's not there nobody tells *that* tale.
Re:Either it came from a 3D printer... (Score:4, Informative)
Re: (Score:3)
Yeah, I was going to make those points too. "Bulletproof" polycarbonate windows are inches thick and laminated to prevent crack propagation. And what'll stop a .22 handgun round won't necessarily stop a .22 rifle round, or the second handgun round for that matter.
But it's not out of the question for something that is 3D printed to stop some bullets, some of the time. You can print in steel, even. They use laser sintering. That might have some interesting properties.
Re: (Score:2)
But it's not out of the question for something that is 3D printed to stop some bullets, some of the time. You can print in steel, even. They use laser sintering.
There's also been 3D printing in some very durable nickel alloys, which would be capable of holding up to higher pressures and temperatures than steel.
That might have some interesting properties.
Indeed.
https://en.wikipedia.org/wiki/... [wikipedia.org]
Re: (Score:2)
(there really is no "bullet proof" stuff, a 50 BMG or .338 Lapua will eat bullet proof glass for lunch)
I've seen YouTube videos that show a 12 gauge slug will defeat most "bulletproof" glass as well. I've gained a new respect for shotguns since seeing that demonstrated. The range from a shotgun might be rather pathetic but up close they can do some real damage.
A .338 Lapua projectile will have a mass of about 1/2 ounce, but a 12 gauge slug will weigh in at twice that. The rifle round might have a bit more energy but the soft lead in a slug, as opposed to the more durable brass or copper needed for a rifle
Re: (Score:2)
The 338 Lapua has about twice the velocity of the 12 GA slug, and weighs in around 250 grains - so it'll have about 2.4 times the energy of the 12 GA slug. And it also has a MUCH smaller cross section, about 20% - so it'll have close to 11 times the PSI imparted on the glass. And PSI is what defeats materials. So the Lapua is MUCH more devastating when it comes to solid materials, as compared to a 12 GA slug.
As far as spread of a shotgun with 00 buck, you'd be surprised. Even at 10 yards [theboxotruth.com], you only have
Re: (Score:2)
The 338 Lapua has about twice the velocity of the 12 GA slug, and weighs in around 250 grains - so it'll have about 2.4 times the energy of the 12 GA slug. And it also has a MUCH smaller cross section, about 20% - so it'll have close to 11 times the PSI imparted on the glass. And PSI is what defeats materials. So the Lapua is MUCH more devastating when it comes to solid materials, as compared to a 12 GA slug.
I understand that. What we see with some real world testing is just how effective a 12 gauge slug is against bullet resistant glass. Testing done on the same web site you linked to.
https://www.theboxotruth.com/t... [theboxotruth.com]
As far as spread of a shotgun with 00 buck, you'd be surprised. Even at 10 yards, you only have a 10 inch spread.
That's going to be more than enough of a spread for buckshot to no longer be able to defeat bullet resistant glass. For this to work the muzzle would likely have to be inches from the glass. As you point out it's the PSI that will defeat the glass, and if those pellets are spread out enough t
Re: (Score:2)
Another note is that most ratings are for a single hit, and repeate
Re: (Score:1)
Re: Either it came from a 3D printer... (Score:2)
You might get lucky with a demo of your one-off printed armor
Maybe if you test it with a 3D-printed "gun."
Re: Either it came from a 3D printer... (Score:2)
when the bullet tears through the bible like it's not there nobody tells *that* tale.
Finally a decent application for the Bible (thank you, James, you miserable, unwashed fuck!).
Still, watermelons are more satisfying...