http://www.cnn.com/2010/WORLD/americas/02/01/bogota.bulletproof.tailor/index.html?hpt=C1

Neat

I find it hilarious that CNN took a video that's been up on Youtube for almost 2.5 years and made it their main story.

Must be one of those slow news days hahah

Work that sweat shop!

Old news though. I had read somewhere else that if they ever create a cheap, efficient way of making carbon nano-tubes, they could make BP clothing (in?)undistinguishable from normal clothes.

I wasn't aware that bulletproof technology had reached this level of effectiveness..

Anyone know what kind of gun/bullet that is and the sort of energy behind it? Surely there are guns that would make mincemeat of that jacket..

There are guns that make mincemeat of kevlar...

All armor is subject to defeat by something... I would imagine they only test stuff like that for up to a 9mm. .45 tops.

They specifically say in the video that their clothing has different levels of protection, from handguns only, all the way up to MP5s and Uzis. All depends on your budget and how much weight you can stand.

I don't think anyone has any sort of delusions that it'll stop a .50 caliber FMJ. Then again, if they're using massive sniper rifles or equivalents on you, they'd probably just shoot you where you don't have armor anyway.

Even if it could stop a 50 cal, the impact would likely ruin you. It'd be like getting hit with a baseball that weighs as much as a car going break-neck speed.

Not really. If it were impossible to absorb the impact of the bullet, it'd be impossible to absorb the impact of the recoil from firing it as well. It's just a matter of spreading the impact force over a large area and not letting the bullet penetrate too far.

A standard issue Beretta 92F (the M9) uses the same ammo as an MP5. The difference is insignificant. An MP5 has a longer barrel so the velocity is higher, but it's still a 9mm round.

Also, it looked like he was using a .38 Special lead round nose, which is a relatively weak round , with about 200 ft/lbs of energy at the muzzle. Compare that with a 9mmx19 at ~350 or a .45 auto round at ~400.

Beside that, the .50BMG is an anti-materiel round. A shooter attempting to kill a human target from a distance would be far more likely to use a 7.63x51 NATO, or a .30 caliber long action magnum (.300 Win Mag, .30-06, .338 Lapua, etc.).

[Upon reading the rest of the article, it states that he was indeed shot with a .38 Spec.]

To prove that you will need the weight of the car, define break-neck speed, need to frontal area of the car, need to know the weight of a single 50 cal bullet, the penetration length of the bullet before being bounced back, the shape of the bullet and the weight of the bullet...

I would love to calculate this. I'm weird

That's pretty cool. I wonder how some of it would fare against a standard military round such as a 5.56x45 or 7.62x39.. though.

Came here to post this.


Wait, what? How does a longer barrel increase velocity? If anything, the friction of the barrel would reduce velocity. The velocity of a bullet from an MP5 should be higher because of a different grain, no?


Definitely, though it's interesting to note that the longest recorded shot was with a .50 BMG from a McMillon TAC-50, 1.51 miles.

GUN THREAD

Long barrel = longer acceleration of the projectile as a result of the gas pressure built up behind the projectile constantly applying force on it...or something like that.



The round fired from a 9mm handgun and a 9mm MP5 are identical as they are both the standard issue 9x19mm Parabellum that was invented in 1902.

the m82 has that self absorbing barrel, I don't think you'd be able to shoot it otherwise.

The amount of powder and the weight of the bullet would indeed have an effect on the speed of the bullet, but barrel length does also because the force of the expanding gas pushes on the bullet for a longer period of time, therefore reaching a higher velocity by the time the bullet exits the barrel.

That's why it's smart to fit the round you use to the gun you intend to use it in. If you're using something like a +P (extra powder) round in a really short barreled pistol like a 3" subcompact, it's probably not going to have much extra effect.

Right right, that makes sense. Thanks.

Nah, there are higher caliber rifles, like elephant guns that have fixed barrels. The barrel on the M82 just makes it easier and more practical.

Unless its a mounted gun it's only spreading out the force, not absorbing it. The force has to go somewhere. It's spreading it out like kevlar and other bulletproof methods attempt to do, just in a different manner.

You know, Newton's third law and all that.

First law you say...?

Whatever one it was, I don't memorize numbers (third) :p

Wikipedia explains where the recoil goes. http://en.wikipedia.org/wiki/Barrett_M82

I fired both the M82 and the AS50. They both kick like a mule, but not as bad as anything in .460 Weatherby Mag. Sweet Zombie Jesus.

Hahah Mexico has some M82s.

i cant remember what it was made out of, but my friend who was in the army rangers had a piece of... something that was pretty well bullet proof. it was made out of layers of rigid fibers crossweaved together. they were actually able to cut through it with a box cutter but if you shot at it the bullet just left a small scratch on it. but that really has nothing to do with this conversation so never mind.

Kevlar. Of course it's not really that useful against rifle rounds which is why they tend to stick big fat thick plates in it.

http://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Modular_Tactical_Vest_components.jpg/800px-Modular_Tactical_Vest_components.jpg