Thread 64494900

Why Is the standard IFV turrets around 25-30 mm and not 40-50mm?

>>64494900 (OP)
it worked fine at the time

It's enough to fight infantry with.

>>64494900 (OP)
diminishing returns on penetration combined with quickly-diminishing returns on ammo count per cubic foot of storage/magazine space.

Anyone know of some good subsonic 9x19 that has lead free primers?

It is a blank area where the crafting is tedious, durability is poor, and power is stagnant.

>>64494900 (OP)
because the guns were chosen in the 70s and 80s, when those calibers were the largest available
the XM723 was initially armed with a 20mm cannon, an upgrade over the .50cal on the M113, but was found to be lacking and replaced with a larger 25mm chaingun

if you went back in time and showed a 35mm armed IFV as a competitor top the XM723, they would have happily adopted it

Whats the difference beetwen rotatory barrelz triple and height onesz autocannon, 5inch guns on ship and heavy machineguns

>>64495162
Are you having a stroke, anon?

>>64494900 (OP)
Is desert peach worth reading?

>>64494900 (OP)
25mm-30mm are the perfect balance between a machine gun and cannon and a true jack of all trades even before the advent of smart fused shells. They work great against infantry, great against low-flying aircraft and helicopters, really great against thin-skinned vehicles and other IFVs/APCs, good against infantry behind sandbags and in trenches and they can even rape a T-90 by shooting its turret ring or outright penetrating its sides

and unlike a cannon you can actually do suppressive fire and have the ammo capacity to do it for a while

How does a p90 magazine work? How do they get the bullets to spin around?

>>64494900 (OP)
because smaller gun = more ammo and IFVs don't have that much space for ammo with all the extra people they're carrying

>>64495319
a ramp

>>64495339
less ammo was never a concern, and the main limitation in not having a bigger gun was mostly just not having anything larger to mount in the first place

>>64495346
A FUCKING RAMP!

>>64495348
Bullshit. That's the reason they stopped making CV90s with 40mm guns.

>>64494900 (OP)
ifvs, as per the name, are for infantry stuff, not for engaging tanks. 25mm is more than sufficient for infantry stuff

>>64494900 (OP)
ammo capacity vs effect tradeoff, 30x173 is the sweet spot

>>64495669
for engaging tanks IFVs carry ATGMs.

there's this legend about Bradleys killing more tanks than M1s during the gulf war

>>64495674
clearly every infantry section is a tank killer because PIATs exist then

>>64495670
it really is this, same reason .223 is king instead of .308 or .45

>>64495670
>>64495681
inb4 someone names some meme round; it was the one that people made 9999999999999 of before the truly optimal round was discovered. Maybe 31x117.2mm Thor will be adopted someday but 25mm and 30mm just werk and there's a fuckton of it around already

>>64495267
This. It’s the perfect size to go against anything not heavily armored. Think about it: if you wanted to protect yourself from 25mm, what would you build? A tank. Well a tank also protects from 40 and 50mm too.
23-30mm will go through civilian concrete buildings and anything this side of a tank. Moving up a bit in size gives you no new capability and only reduces your ammo load.
If you were taking fire from a commie block, would you rather have 300 rounds of 25mm or 70 rounds of 40mm? The slightly bigger holes aren’t doing much for you.
.50 cal is too small and 40-50mm sits in a zone where you’re severely sacrificing ammo count for no new capability over 23-30mm, so 23-30 is just a sweet spot for cannons.

>>64495767
Then why don't they arm infantry with 30mm?

>>64495666
the bradleys replacement is already eyeing 50mm autocannons for a more effective programmable round

>>64495666
>That's the reason they stopped making CV90s with 40mm guns.
It's not only that. The Bofors 40 is really fucking big and really fucking heavy. If you want to uparmor the vehicle, you have to cut weight from somewhere.

>>64495836
the 50mm rounds for those are almost the size of 25mm ones, they're super compact cased telescopic tubes rather than typical brass bottle necked cases.

>>64495848
just put a bigger engine? fucking idiot

>>64495767
modern IFVs are armored against 30mm APFSDS. the problem is that none of the expected enemies of modern countries have any modern IFVs so upgunning them is pretty pointless for AP.

>>64495862
>the problem is that none of the expected enemies of modern countries have any modern IFVs
true, china is still using horse-drawn carriages

Are A5 tubes a meme? Bought one on impulse.

>>64494900 (OP)
Because big enough to kill BMP

>>64495767
>If you were taking fire from a commie block, would you rather have 300 rounds of 25mm or 70 rounds of 40mm?
Rounds penetration widely varies with type. 25mm 792 HEI ain't gonna penetrate commieblock wall. 791 APDS will but doesn't produce fragments.
Programed fuse HE set in delay will penetrate wall with boom inside but 25mm doesn't have such, also it would penetrate commieblock with difficulty.

>>64495346
What do you mean a ramp, the bullets got skateboard wheels or something?

Anyone who happens to have a cloud defensive rein 3, do other light tailcaps work with it? I want to replace mine with a Surefire dual feed cap so I can get a different switch.

>>64497495
i had to look all that shit up but if it's just a normal switch it would be pretty easy to modify even if the cap doesnt physically fit

literally just take the switch off, solder a line down where the switch was, and put it to your ebin tactical taped on switch elsewhere

>>64496829
it's spin 2 win. its literally a spiral ramp like a multistory parking lot

>>64498142
>le just le solder it LOL
Yes just destroy my 1500$ weapon light for no reason when I can just buy a new cap. Fuck you retard.

>>64498142
>solder
it's "sodder" you illiterate nigger

People who own NFA items, what was that process like? Did you run into any snags? And how did your LGS handle it?

>>64495855
It’s a necked up 35x228mm round. It is significantly larger than any 25mm round.

>>64499306
I used silencershop for both making an SBR and buying suppressor. Don't know how in shop purchases of those would go, but the process is smooth. Just dont be a retard like me and forget your ATF login info and take 10 minutes trying to reset it

>>64499378
I didn't know about silencershop until now. Still seems like a bit of a pain to setup but once it's done it sounds like it should be easy for future NFA items.

Are archery and air rifles ok? I can't own a real gun because I'm a fucking lunatic

>>64499542
Archery can be quite good as a sport as it not only encourages improvements in hand-eye coordination but also fitness in particular it helps improve upper core strength. If starting out I'd recommend no more than a 20lb draw especially if you got no arm muscle.

>>64495262
Looks vaguely pornographic in an indie western artist manner.

>>64495262
Not sure if it has enough homosexuality for your average /k/ reader?

Also asking here: >>64500665

>>64500489
Oh I'm sure it passes that with flying colors, it's the rest I'm wondering about. From what I've seen she nails vehicles and equipment pretty accurately. I'm mostly wondering if the "Nazis and war are le bad" is too heavy handed.

>>64500469
You'd be correct, but I'm at least fairly confident it doesn't go THAT far

>>64500986
Seems a bit Mel Brooks tier in terms of writing about Nazis?

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