87

A smart gun which only fires in the hands of an authorised individual -- which may include any soldier in your army -- is a useful and practical concept. It may have issues when transferring weapons between units, if someone's fingerprints change etc. A weapon which explodes in the wrong hands is a dangerous liability. It means all a captive has to do is try ...


77

Make the atmosphere more combustible by adding lots of methane or other super-volatile gases. It won't stop the guns from functioning, but it will make using them suicidal for the wielder. It does not even have to be super volatile gasses (as the presence of such might prevent human to walk around without life support systems), it is enough to increase the ...


68

Johnny walked the two pairs of shotguns over to Stormhoof and Cloudwing. “So, you strap these on so they are on either side. Then when you get to their line, pull these strings and they’ll shoot. Good?” Stormhoof made no move. He looked at the guns. “Why do you not strap these guns on to the humans?” He gestured with his chin to the infantrymen ...


62

(...) propellant that expands at near light speeds (...) It doesn't matter whether the projectiles themselves would go near light speed... Just the propellants doing so would already be quite hazardous. The very first XKCD - what if article deals exactly with that. The scenario is a baseball being thrown at 90% of the speed of light. It is a very fun read, ...


48

(I feel bad about giving this answer, given how horrifying this weapon continues to be in the modern world, and how unconscionable it is to have it widespread any earlier in history, but...) You are starting out with handheld weapons, but if it were me, looking to alter the course of warfare most simply and effectively in the middle ages, I would go with ...


47

It's complicated: First of all, kudos for limiting it to five seconds. More than that starts getting strange. Second, I strongly suspect you're going to start hitting a problem with precognition, which is that prediction alters reality which alters precognition. When your precognitive dodges the bullet, they're still visible and light travels REALLY fast. So ...


46

The Japanese Samurai were enthusiastic proponents of firearms. One of the most dramatic scenes in a Japanese movie is the ending of Kagemusha, which recreates the Battle of Nagashino, where the Takeda clan was essentially destroyed as a power by the effects of volley fire by Oda Nobunaga's troops. Volley fire isn't fun if you are running into it So if ...


46

Bring the Tools, not the Weapons The hard part here is getting the precision tooling you will need done right. Rifling a barrel and pressing ammunition is pretty darn hard without the right equipment, but all the tools needed to set up a fire-arms and munitions workshop take up surprisingly little space. Since he has enough wealth in the 21st century to ...


45

Yes, you are right. Under those rules, aligning hand (or arm), shoulder, eye and body in the straightest way would be the best posture for accuracy. Essentially the postures adopted by Olympic handgun shooters or archers: But we can play around a bit. You said that you have to accumulate energy around the arm before shooting... How accurate are those ...


44

In point of fact, you do not want fast propellants in firearms. Here's what happens when you load a fast-burning pistol powder into rifle cartridges: http://bulletin.accurateshooter.com/2015/01/what-happens-when-you-load-pistol-powder-in-a-rifle-cartridge/ This is only due to the difference in detonation rates between two types of gunpowder - all of which ...


44

Forfeit If this is a reality show, then there must be cameras (or something analogous). And it's in the interests of the show runners to get good footage of the event, so it should already be against the rules to destroy, circumvent or simply evade the cameras, because what's the point of any of it if they can't broadcast it happening? Given that, it ...


43

Considering the propellant in all munitions that I'm aware of (except fuel-air bombs and spud guns) is self-oxidising, that is to say, it requires nothing from the atmosphere (guns and bombs work fine underwater or even in space - well... they work fine once anyway) I'm inclined to say that, other than some kind of corrosive atmosphere eating the shells, ...


43

The simplest approach would be, as far as I can tell given the tech levels, to have the robots' programming dictate that they need to use those weapons. As a potential option, have the protagonists' enclave be a reenactment park, where humans used to go to watch robots reenact scenes from the old West. For realism, the robots used live rounds, and were ...


43

The answer is cold welding. Modern engineers struggle to prevent cold welding in space from destroying moving parts. Maybe your engineers have come up with a coating for the inside of the guns that prevents moving parts from sticking together, but the forces involved when a semiautomatic fires, ejects the empty shell, and chambers the next would strip that ...


42

You can make bullets out of almost any metal if you want, but there are always going to be tradeoffs. Why are most bullets today made of lead? It's dense. This means that you get more mass (hence more momentum) in a smaller package (hence less wind resistance). It's also deformable, so when it hits a target, it spreads and does more damage. It also has ...


40

Boring old lead shot. This is post apocalypse! Can't we jazz it up some? Let us consider the blunderbuss, a black powder muzzle-loaded shotgun and a fine weapon for your survivors. I thought you could shoot anything from one of these but apparently not. The following is an article on Lewis and Clark's use of blunderbusses. http://www.lewis-clark.org/...


40

There are cases where you want someone to handle the gun without firing it. Just to name a few: the legitimate holder has lost the gun and someone returns it to them the legitimate holder is dead but a comrade can still use the weapon the gun has to be serviced/inspected the gun has to be handed over in custody Moreover, having the explosive gun would give ...


38

Unless he's an expert metallurgist the biggest issue you're going to have isn't in terms of producing the parts; anyone with a drill and a hand file (or some rocks that will serve the purpose) and enough patience can make a gun from a solid block of appropriate metal and therein lies the problem. Modern weapons require modern alloys, many of which are ...


38

I'll start by assuming the your aim is survival - not to finish off World War 3 Learn to use a spear/club/javelin. First Point - Modern ammunition has a finite supply - it cannot be replaced if the industry that produces it is destroyed. Your problem will be that in such a world ammunition supplies will be immediately limited to existing stock. And most ...


35

Dust is going to be a big problem for anything with moving parts. Moon dust caused all kinds of havoc with the Apollo missions, getting all over every surface, causing respiratory problems, destroying equipment. Moon dust is incredibly sharp and abrasive, and because of UV bombardment it is also electrostatically charged, meaning that it wants to stick to ...


35

No. They don't need to pack weapons. The very spaceship they are travelling from Proxima Centauri is already absolutely packed with weapons because by itself it is a weapon. Its propulsion system will be powerful, destructive, energetic and deadly than any ship-mounted weapon would be. Even its communication systems, for example, interstellar range laser ...


35

With most firearms, the simplest, quickest way to "brick" the piece (without killing or maiming anyone, including the users) is to weld moving parts together so they become non-moving parts. The cylinder in a revolver can't rotate, the firing pin and slide in a semi-auto won't move on their rails or in their passage. The ammunition would be unsafe to ...


32

Perhaps the most convincing reason to prefer a revolver over a semi-auto in a microgravity environment is because, while both fire a heavy, high velocity (relative to human senses) projectile, the semi-auto also ejects a lighter, lower-velocity projectile. In a gravity field, the empty case ejected from a semi-automatic pistol usually arcs up and over the ...


30

From OP And yes, the robots would be making this tech themselves, not just grabbing old Winchester leverguns and Colt peacemakers from museums. But the first ones did. More advanced weapons were made by the persons who made these robots, but the area where the robots are have no such weapons. Nor is there detailed information about these weapons ...


30

Farmers Farmers commonly use flame throwers for clearing fields and brush. they kill weeds and their seeds as well as pests. tractor mounted flamethrowers even exist. Forestry service Forestry services often use flamethrowers for setting back fires, and clearing brush.


29

Most settings with magic involve some kind of restriction or cost for that magic, to prevent mages from simply using magic constantly to do anything. Sometimes it requires sacrifice, or mages have a limited mana pool that must be recharged by ritual or rest, or even just needing to clear one's mind and focus to cast properly, or it might take time for a ...


28

You could, but you'd be missing one of the big benefits of a centaur: the human half. Instead of strapping the shotguns to be fired at random, why not holster a number of shotguns (the centaur could certainly carry a whole bunch), and the centaur's human part can grab them and fire them in any direction as the need arises? That would give you the speed ...


28

A colony of humans has discovered a way to make propellant that expands at near light speeds. Let's take a look at what we're actually dealing with here. I assume your intent is that you want to get projectiles going at relativistic speeds. If you look at the formula for relativistic kinetic energy it's pretty easy to derive that going at $\sqrt{0.75}c$ ...


28

In real conflict your most ideal position is always prone. Barring this, any position behind cover. This is for a few main reasons: Increase accuracy in shot (a steadier arm) and therefore greater range Reduced profile to the enemy Greater ability for stealth No-one uses pistol stances anymore - it is simply not practical as you present too large a target. ...


28

Mount the gun, yes The M134 has a lightweight variant, which weighs just under 20kg. I think that's entirely plausible to mount on an animal that size - use leather or some other padding underneath the gun so no metal touches skin, vibrations are minimised, and using leather belts to wrap around and tighten. You'd want a few attachment points at varying ...


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