Mega Rad Gun Thread

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I understand why a case like this makes sense with a high cyclic rate, but beyond that I don't see much benefit, especially in terms of cost & civilian utility.

And what about reloading? A thin lockwasher retaining the case head isn't exactly confidence inspiring.
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beyond that I don't see much benefit
i've ordered a couple cases of 6.8x51mm and .277 SIG Fury, so i'll see how it goes. i haven't even gotten a receipt for the MCX SPEAR 1st edition whatever, it's just "processing".

generally, case failure occurs mostly at the web or the neck, and a nickel plated steel base with brass case offers the best of both worlds: a strong web and sufficient flow of material for a gas seal in the chamber during peak pressure. the locking washer is a mechanical lock design that is simple and probably plenty sufficient for extraction. a 140gr bullet at 3000 feet per second is plenty fast for a short action rifle so i imagine a polymer case would have locking issues when softened under heat and pressure during firing and an alternative was either too expensive or too unreliable for rough handling without some radical departure in design like telescopic ammunition or a wholly caseless design with emulsified propellant.

as for reloading i don't see why it would work if you alter the priming tool slightly. it's still a primer with anvil and flash hole seemingly.
 
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And what about reloading? A thin lockwasher retaining the case head isn't exactly confidence inspiring.
There's a hybrid case design called NAS3 available for 9mm, and it uses a simpler method of joining the case head and case walls - just flaring out a bottlenecked tube against the primer pocket.
This guy on youtube tested a case with charges 15% above +P loads - it failed in the 11th reload and it was the case wall that failed, not the actual method of joining the pieces together.
If anything, the lockwasher method looks stronger than the NAS3 method.
 
https://en.m.wikipedia.org/wiki/.277_Fury

It looks like they had to increase the pressure to a ridiculous degree to get to 3000 fps. How much does the chamber have to be beefed up to support that? Or do you have to cut the barrel from some exotic grade of steel?

Also, doing some rough math it looks like recoil is pretty much equal to that of the M80 round so aren’t we back to the supposed problem with the M14? A heavy rifle with too much recoil? (Granted, the SIG appears to weigh almost a pound less than the M14)
 
How much does the chamber have to be beefed up to support that? Or do you have to cut the barrel from some exotic grade of steel?
neither. more than likely you would have a few reliefs combined with a ductile steel treatment that would allow some minor flex at specific points during peak pressure to reduce the chance of cracking and embrittlement by making sure you have a difference in hardness enough to prevent power growth over a period of time where it would eventually fail. this sort of thing isn't new in high power rifle receiver design or artillery.

what is a bit concerning might be how they're dealing with the high pressure gasses during the firing cycle - 80k psi would need some way to slow gasses enough so bolt velocity won't prematurely fatigue or shear locking lugs or develop strange moments where pins are breaking. the MCX team worked on the HK416 and XCR rifles in the past prior to SIG getting them for the MCX so they've probably worked this out through some method. Weatherby beefed up lugs and HK used a bleed regulator. the MCX uses a modified FN/Steyr approach with a gas regulation valve with captive short stroke piston and spring detente to gate pressure under or over the required amount to overcome the spring and allow gas to reach the piston.

maybe a combination of the above is what's in use. hopefully i'll find out soon. also the MCX Spear is about 8lbs unloaded, so it's slightly heavier than the current M16A4.
 
Is there a working version of that Vortex optic already, or just mockups? It sounds a lot like what they tried doing with the OICW, also had a needlessly complicated fire control system.
 
Is there a working version of that Vortex optic already
it's a combination of Leupold's M5C optics technology with miniaturization, mounting, and assembly design done by Vortex and a modified, miniturized electronics package from L3 Harris. it's not super new tech (last 5-6 years or so) but it's an all-in-one and made smaller with reliability in mind and is functional without any active power sources purely as an aiming device and as far as i'm aware of is the only etched non-powered NV compatible scope developed. not sure how they pulled that off either.
 
it's a combination of Leupold's M5C optics technology with miniaturization, mounting, and assembly design done by Vortex and a modified, miniturized electronics package from L3 Harris. it's not super new tech (last 5-6 years or so) but it's an all-in-one and made smaller with reliability in mind and is functional without any active power sources purely as an aiming device and as far as i'm aware of is the only etched non-powered NV compatible scope developed. not sure how they pulled that off either.
Interesting, thanks. Video shows it to be a modular design, the rangefinder module is removable. Question is, how useful will a ballistic calculator be on a fighting rifle with a 1-8 LPVO anyway?
 
My guess on the 6.8 is it has to do with peer adversaries all deploying body armor. According to a couple of articles I read the army developed this new projectile and handed it to the various companies saying “make us a round and gun to shoot this projectile”.
Pretty much. From what I understand the army specifically requested that the gun/ammo used can penetrate level IV armor at something like 600m. It's also more than near-peers finally adopting body armor (though that's certainly a concern). Even small terror cells in MENA shitholes are able to get their hands on bodyarmor now.
it's a combination of Leupold's M5C optics technology with miniaturization, mounting, and assembly design done by Vortex and a modified, miniturized electronics package from L3 Harris. it's not super new tech (last 5-6 years or so) but it's an all-in-one and made smaller with reliability in mind and is functional without any active power sources purely as an aiming device and as far as i'm aware of is the only etched non-powered NV compatible scope developed. not sure how they pulled that off either.
I'm interested to see how the new optics tech pans out. What they have is quite impressive and in my (civilian) opinion if it can do half the shit it claims it would be worth the extra weight in medium-long range engagements. The main issue I see is that most analysts are predicting future conflicts to take place in close ranges and urbanized areas, while the new optic seems tailor-made for the long-range engagements characterizing the Afghan conflict. Last war syndrome perhaps?
 
Interesting, thanks. Video shows it to be a modular design, the rangefinder module is removable. Question is, how useful will a ballistic calculator be on a fighting rifle with a 1-8 LPVO anyway?
https://youtube.com/watch?v=y7NLMU1JZkY:1388
The weight comparison is hilarious. They picked the most cumbersome thing possible to compare it to.
I think it'll be useful in the field, but not a game-changer. I want one so bad though. I'm a tad gear-queer,
 
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Pretty much. From what I understand the army specifically requested that the gun/ammo used can penetrate level IV armor at something like 600m. It's also more than near-peers finally adopting body armor (though that's certainly a concern). Even small terror cells in MENA shitholes are able to get their hands on bodyarmor now.
That brings up an interesting question. How long would it take until someone comes up with plates that can defeat that round? The moment it hits the market, China is going to start working on plates to defeat it, and the moment they have something barely passable, they'll flood the markets. From a logistics perspective it's way faster to roll out new armor than new guns with new ammo.
 
Allegedly already exists, but cannot independently confirm. This plate is said to be able to stop the NGSW 6.8

While there do exist plates that stop HMG cartridges those are not widely employed.
Curious to see how these will perform when actually tested. Eventually it boils down to simple physics and 6.8 isn't magic, so if these plates are just massively overbuilt, they should be able to stop it.
 
That brings up an interesting question. How long would it take until someone comes up with plates that can defeat that round? The moment it hits the market, China is going to start working on plates to defeat it, and the moment they have something barely passable, they'll flood the markets. From a logistics perspective it's way faster to roll out new armor than new guns with new ammo.
IIRC, Russia already claims to have a body armor solution capable of surviving a direct impact from a .50 BMG, but I highly doubt the reliability or practicality of that claim. Either way, they claim to be rolling it out during "phase III" of Ratink, but given they couldn't even afford to complete phase I, I doubt it's coming anytime soon.

China, on the other hand, is a bit more of a wildcard. What I can say, however, is China seems to be way behind the times militarily (they're only JUST planning on rolling out body armor for its army), lagging on military hardware development, horribly corrupt, and entering an unknown period economically. Not to say that they won't do anything, but the chance of any effective solution being rolled out year 1 is unlikely.

Either way, new plates that can reliably stop the 6.8, barring any breakthrough in materials science, will be heavier than the plates already standard to western militaries. It could probably be developed, but it will be a question of whether the added protection will be worth the extra weight. Given that both Russia and China still don't have optics or nods as standard gear, the added weight might mean less to them, but it's still a consideration that has to be made nonetheless.
 
... new plates that can reliably stop the 6.8, barring any breakthrough in materials science, will be heavier than the plates already standard to western militaries. It could probably be developed, but it will be a question of whether the added protection will be worth the extra weight. Given that both Russia and China still don't have optics or nods as standard gear, the added weight might mean less to them, but it's still a consideration that has to be made nonetheless.
Power-assisted exoskeletons (partial or otherwise) should be a thing soon, to help hump all that fancy armor & ammo; especially as servos, circuits, and batteries become smaller & more efficient, along with rapid 3D printed prototyping & advanced polymer/composite armatures.

Not holding much hope for seeing actual battlemechs before I die, though, considering how prevalent ATGMs are now.
 
Power-assisted exoskeletons (partial or otherwise) should be a thing soon, to help hump all that fancy armor & ammo; especially as servos, circuits, and batteries become smaller & more efficient, along with rapid 3D printed prototyping & advanced polymer/composite armatures.

Not holding much hope for seeing actual battlemechs before I die, though, considering how prevalent ATGMs are now.
I doubt we'll see them really soon, but there are some interesting unpowered shooting armatures that use springs and shit to take the weight of a rifle (or other stuff, it's like a lockable armrest) off your hand and put it on your back. I find those real interesting. Power supply is going to be a problem for true exoskeletons for a while yet.
 
Power-assisted exoskeletons (partial or otherwise) should be a thing soon, to help hump all that fancy armor & ammo; especially as servos, circuits, and batteries become smaller & more efficient, along with rapid 3D printed prototyping & advanced polymer/composite armatures.

Not holding much hope for seeing actual battlemechs before I die, though, considering how prevalent ATGMs are now.
I doubt we'll see them really soon, but there are some interesting unpowered shooting armatures that use springs and shit to take the weight of a rifle (or other stuff, it's like a lockable armrest) off your hand and put it on your back. I find those real interesting. Power supply is going to be a problem for true exoskeletons for a while yet.
Powered Exoskeletons are bad, dumb, impractical and unnecessary. The Russians have proven that passive Exoskeletons are all that are needed with their EO-2 Model. You know why DOD has been fucking around with Exoskeletons since mid-GWOT and have made around zero progress? Because the stupid motherfuckers INSIST on a powered exoskeleton, going so far as to seriously consider a design powered by a small combustion engine.
 
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