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Army Researchers Patent Self-destructing Bullet Designed To Save Lives (networkworld.com)

An anonymous reader writes: Researchers from the U.S. Army Armament Research, Development and Engineering Center recently patented a new type of bullet capable of self-destructing after traveling over a predetermined distance. The idea behind the new and advanced projectile is that it might help limit the extent of collateral damage (read: innocents dying) during battle or in other operational settings and environments. As for how it all works, the U.S. Army explains that when one of these limited-range projectiles is fired, a pyrotechnical material is ignited at the same time and reacts with a special coating on the bullet. "The pyrotechnic material ignites the reactive material, and if the projectile reaches a maximum desired range prior to impact with a target," the Army writes, "the ignited reactive material transforms the projectile into an aerodynamically unstable object." The researchers add that the desired range of its limited-range projectile can be adjusted by switching up the reactive materials used. Put simply, the Army has come up with what effectively amounts to a self-destructing bullet that is rendered ineffective over certain distances.

33 of 230 comments (clear)

  1. Re:LESS! by TechyImmigrant · · Score: 4, Insightful

    Or less effective even

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  2. What happens when they hit their target? by DaHat · · Score: 2

    I'm sure someone in the Army has read the Hague Convention of 1899, Declaration III which prohibits "the use of bullets which expand or flatten easily in the human body".

    Unless these things have a built in kill switch which causes them not to explode upon entering a human body, I'd think these things would be illegal for normal warfare.

    1. Re: What happens when they hit their target? by Entrope · · Score: 3, Informative

      It sounds like the reacting coating causes the bullet to start tumbling in the air, and the increased drag is what stops the bullet. It could come apart, or just get a groove on one side; it doesn't have to flatten out anything like tgat.

      Presumably one novel part of the research involves ensuring that the coating only reacts when the bullet has been fired and is moving at high speed.

    2. Re: What happens when they hit their target? by Entrope · · Score: 2

      When somebody says "the Geneva Convention" without specifying which one they're talking about, it's a good sign they don't know what they're talking about.

      In this case, the Geneva Conventions do not address the use of unmanned aircraft, and the Convention on Cluster Munitions (to which the US has not acceded) was worked out in Geneva but is not generally counted as a Geneva Convention.

    3. Re: What happens when they hit their target? by Rei · · Score: 4, Informative

      These things can have unintended consequences, however. Anyone else remember the DIME explosives Israel's been using? Small explosive radius! High lethality within that radius, but the fragments slow down rapidly outside it! Peppers the people around it with countless bits of inoperable, highly carcinogenic shrapnel! Wait, forget that last one.... Small but effective blast radius!

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    4. Re:What happens when they hit their target? by dsmatthews9379 · · Score: 2

      Yes the idea does seem fundamentally flawed in that it could never transform instantly therefore there is a range after a point beyond the target and before the point of complete self destruction where the projectile would probably do far more damage to a soft target than it otherwise would.

      As a ground to air type projectile it may be ideal, however just having them explode on a timed fuse would do the same job and that is a very old idea.

      I am not surprised that they have no funding.

      The only acceptable "new" weapon is one that works at a long range and rapidly renders active combatants incapable of cognition for a limited period of time, long enough to capture and incarcerate them, a matter of hours at most and without permanent damage. However I am sure that most governments would settle for leaving them brain dead. This is where things are headed due to the interaction of two ideologies, the killing to enforce political will is OK camp, and the all killing is always wrong camp. You end up with weapons that are in some ways more horrific than what they replaced. Oh well that is hairless monkeys for you.

    5. Re:What happens when they hit their target? by Firethorn · · Score: 2

      I'm sure someone in the Army has read the Hague Convention of 1899, Declaration III [yale.edu] which prohibits "the use of bullets which expand or flatten easily in the human body".

      I'm USAF and I read it. However, I'll point out that the USA didn't sign that convention. Our non-use of expanding bullets is based on the Geneva 'no undue harm' standard, which bans weapons that cause unnecessary suffering, which is taken to be small explosive rounds(below .50 Cal), non-metallic(so it can't be seen via x-ray and metal detectors), and expanding bullets.

      However, I once wrote a paper arguing that expanding rounds SHOULD be issued, showing that lethality and disability tends to be on a per-bullet basis, and people tend to be shot fewer times with expanding rounds. Ergo, you're more likely to survive and less likely to be disabled from being shot 3 times(average) with hollow points rather than the (average) 5 FMJ shooters tend to fire. The lower number of shots also indicates an increase in effectiveness per round, which means that hollowpoints would meet the 'military effectiveness' standard. Which allows darn near anything as long as it's the most effective, economical way to do something.

      --
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    6. Re: What happens when they hit their target? by tnk1 · · Score: 2

      I'm not too fond of Obama, but I think he was stuck with this situation from Day One. The only argument I have with him is that he pulled out of Iraq way too early, but since that promise was necessary to get him elected, I almost don't blame him for it. The guy who got elected was going to be the one to do the pull out. I just wish he'd found a way to do it that didn't immediately play into the hands of groups that would become ISIS.

      And no, he's not a brutal hawk. He's just a guy caught behind the wing of his party that wants to make this all just disappear, and the realities of being President. And that is a situation that is guaranteed to turn a leader into someone who promises peace on one hand, and drone strikes weddings on the other. He's not willing to do what it takes to end the problem, because he's be seen as brutal and illiberal, but he can't disengage. So he's been taking the half-measures that turn war into a long, drawn out disaster filled with collateral damage. We'll probably deliver more civilian collateral damage to Syria and Iraq than if we went in with a few divisions and ran over ISIS.

  3. A Taste of Armageddon by Anonymous Coward · · Score: 2, Insightful

    The point of war is to cause so much damage to your opponent that they give up whatever they were fighting for or you wipe them out completely, having a safe war where only the fighting soldiers die in designated warzones is utterly pointless, you might as well sort things out with a game of football or something. If we really don't want civilian casualties we need to drop the pretense of concepts like "precision" bombing / strikes, safe-T-bullets and/or whatever other NERF-coated garbage makes war a desirable THING to keep doing forever.

    War is Hell and we shouldn't want to fight it. Period.

    1. Re:A Taste of Armageddon by ScentCone · · Score: 4, Interesting

      The point of war is to cause so much damage to your opponent that they give up whatever they were fighting for

      But that is NOT the point, necessarily, of every Special Forces operation. Or the circumstances in which SWAT operators have to do their thing. I can see wanting a high-powered rifle round that is absolutely devastating at close and intermediate distances but which quickly begins to tumble and rapidly bleed off velocity down range. That feature is not inconsistent with causing "so much damage" to bad guys, but it can help preserve the lives of non-combatants that are a kilometer away.

      --
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    2. Re:A Taste of Armageddon by drnb · · Score: 2

      For close range you are effectively describing the characteristics of a shotgun. Which is popular with police and the military for these reasons. The first marines to drop into Iraqi trenches and bunkers during the first gulf war were as likely to be armed with pump shotguns as M16s.

  4. Range Limiting Bullet by nicoleb_x · · Score: 2

    Certainly not destructive, just range limited. Actually, makes a lot of sense, especially during training where you'd like to keep bullets inside a well defined area.

  5. Fire risk? by timrod · · Score: 2

    The chemicals they're using for this sound similar to the ones used in tracer ammo. Tracer ammo is notorious for causing unintentional fires, and if this stuff has to burn hot enough to melt the lead bullets I can only imagine how effective it must be at starting fires.

  6. Re:Who Would Want it? by Anonymous Coward · · Score: 5, Interesting

    No, you lug around 40 pounds of ammo with a range set at the maximum effective range of your weapon. Then if you miss your shot doesn't go on to create a friendly fire casualty when it goes on to hit a guy you couldn't even see from the position you fired it.

  7. How common is this? by Copid · · Score: 3, Interesting

    Is there any data on how much of an issue this is? Even in a war zone? It seems like in an area of active engagement, stray bullets from a distance would be on the low end of things that cause collateral damage. I mean, we have bombs getting dropped from aircraft and missiles being shot from drones. I'd be willing to bet that even a tiny increase in the specificity of those types of weapons would save far more lives than limiting the lethal range of bullets.

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    1. Re:How common is this? by Mal-2 · · Score: 2

      They could be quite useful in a civilian context though, or when infantry are going block-to-block in an inhabited area. If I'm using a firearm defensively in my own home, I probably don't want to hit anything more than 50 feet away. Sure it still has to stop somewhere, but losing velocity and tumbling will hopefully remove some of the potential to harm someone who happened to be near the firing line but in the background. Even better if this means it gets stopped by the first wall it hits.

      --
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  8. Re:LESS! by wonkey_monkey · · Score: 4, Funny

    Fewer effective.

    Morons.

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  9. Re:LESS! by Shoten · · Score: 4, Funny

    Fewer effective.

    Morons.

    Actually, as I understand it, the project started under George W. Bush, so the original research proposal stated that the desired bullet would be "morer ineffectivicated" after it went "kinda far."

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  10. Re:Explosive bullets by lister+king+of+smeg · · Score: 3, Insightful

    and if it does hit someone I guess it explodes inside them instead

    <sarcasm> No that that would a violation of the rules of war this is a safety feature. really honest. The military would never try to get around those.</sarcasm>

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  11. Re:Who Would Want it? by drnb · · Score: 2

    ...except war isn't quite that organized.

    Actually it is. Inherent in the M16/M4 design is that a soldier does not really need to pick off another soldier at 700 yards. That they are better served with a smaller more intermediate cartridge that is more limited in range but allows the soldier to carry two to three times the ammo for the same weight. And what justified this logic, the Army's own data from debriefing combat troops at the end of WW2. Despite the M1 Garand's respectable long range accuracy the Army, to their great surprise, discovered that soldiers with Garands almost never fired at a target beyond 100 yards.

    ...you have an entire division of men (and women) quite capable of accurately hitting targets at ranges you're so eager to dismiss out of hand.

    The GP did no such thing, its the US Army that defines the effective range of the M4 to be 500m.

  12. Re:LESS! by blindseer · · Score: 2, Interesting

    As an honorably discharged Specialist in the US Army I say, "Go fuck yourself... Sir!"

    --
    I am armed because I am free. I am free because I am armed.
  13. Re:Who Would Want it? by tnk1 · · Score: 2

    Yes, but the point was that you still want flexibility. You might find yourself in a situation where you might be prone and want to and be able to take a slow shot at someone at extreme range.

    Of course, that is why they have "designated marksman" weapons, which are stock weapons that have been fine tuned and upgraded which can achieve much more accuracy without being completely new weapons with different ammo. But you don't always have a DM or their weapon.

    Not sure how I feel about it, but it would probably be okay to have your round self destruct at actual maximum effective range. Just don't give the DM that ammo.

  14. Re:LESS! by KGIII · · Score: 2

    Yeah, that was fixed in about six months as I recall. It had to do with the failure to realize that they had to be kept clean, more than anything else. Some say it was actually just a simple miscommunication, but I'm inclined to think it was just incompetence. It hasn't been a problem since the poster was probably born. It was a solved issue by 1975 - I can speak to this first-hand.

    --
    "So long and thanks for all the fish."
  15. In your gut! by AndyKron · · Score: 2

    And within the range you get a reacting bullet in your gut.

  16. Re:Who Would Want it? by lgw · · Score: 2

    I'd bet they'd be set up for 1km or so for small arms - somewhere beyond the point where anyone is hitting on purpose.

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  17. Re:LESS! by Shoten · · Score: 2

    I'm sure that once just one of these rounds malfunctions and destroys itself while still in the barrel, your rifle will disintegrate quite effectively while firing subsequent rounds.

    Read TFA.

    The rounds don't destroy themselves, they just become aerodynamically unstable and tumble, which makes them lose energy VERY quickly and subsequently drop like a rock so that they don't travel very far. None of this is a problem inside the ammo case, the magazine, the breech, the barrel itself or the muzzle.

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  18. Army changed the powder by drnb · · Score: 2

    It was not simply a failure to keep it clean. Armalite designed their AR-15 (militarized by the Army into the M16) to use a very clean burning powder. This appropriate powder may have also been used during evaluation, not 100% sure. However for mass production the Army went with the old ball powder it had been (since late WW2 ?). The powder left far more residue behind. For a direct gas operating mechanism this was a bad idea and greatly increased the amount of fouling and cleaning required.

    There *may* have been another problem. I haven't read about it in any official history (like the powder issue above) but I once worked for a man who had been once of the very first Marines sent to the DaNang area and had to trade their M14s in for M16s. Besides the powder residue problem he claimed there was some mechanical component that would break if there was too much full auto fire (heat). There was no corrective action, you had to see the armorer when you got back to base. He said they carried a lot of extra grenades as a result of all this.

  19. Re:Who Would Want it? by tsotha · · Score: 2

    What's a realistic range for an aimed shot in 5.56 NATO? 300 meters? But the bullet can go more than a mile if you put it in the right trajectory. I wouldn't mind having a round that destroys itself after 300 meters. More than that and you're probably hitting something you didn't aim at.

  20. Re:Explosive bullets by ShanghaiBill · · Score: 4, Insightful

    Even normal tracer rounds can be aerodynamically unstable as the tracer element is exhausted. When I was a Marine, we were taught to never fire 7.62mm tracers overhead of friendly troops beyond a range of 700m, and no more than 400m for 5.56mm tracers. This is the range where they stop glowing. This announcement seems odd to me, since unstable trajectories should make the bullets more dangerous, and they would also be incendiary (they set stuff on fire).

    A better approach to limiting the range of bullets may be to train soldiers to avoid excessively elevating their muzzles. Poorly trained troops have a tendency to shoot high, especially at night.

  21. prior art? by ihtoit · · Score: 2

    The Radically Invasive Projectile: exploding inside a breech near you! http://g2rammo.com/

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  22. Re:LESS! by silentcoder · · Score: 2

    When your opponent has a gun that will fire reliably while burried in mud, or filled with sand, a gun you "must keep clean" is a dismal failure and putting in place procedures to ensure it's kept clean is not "fixing" it.

    --
    Unicode killed the ASCII-art *
  23. Re:LESS! by Zak3056 · · Score: 4, Insightful

    Somebody who was NOT there has to decide what "could be avoided" means, because merely being there must inevitably compromise your judgement.

    Somebody who was NOT there has the benefit of 20/20 hindsight, and history shows they will crucify the poor son of a bitch who was in the bad situation at the time, ignoring that sometimes you do NOT have the luxury of deep thought. Things like Abu Ghraib can be judged by anyone--there was no element of "you need to do this immediately or you and your friends will die." When it comes to "why did you shoot at that house full of civilians?" the issue is a LOT more complicated.

    Discounting someone's judgement "because they were there" is inexcusable. Doing so on the topic in question ("Your weapon doesn't work properly because you're a murdering bastard and this is a safety feature to keep you from murdering more people") does, indeed, merit the response "Go fuck yourself."

    --
    What part of "shall not be infringed" is so hard to understand?
  24. Re:Who Would Want it? by Bender0x7D1 · · Score: 2

    For an M16, the max effective range against a point target (single person) is 550 meters. For an area target (vehicle or troop formation) it is 800 meters.

    Wikipedia

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