Double-Cut During the War of Resistance: My Wife Came from 1937

"This...this bulletproof vest can actually stop bullets!"

Seeing the bullet stuck in her bulletproof vest, Xia Weiwei couldn't help but exclaim in surprise.

Automatic guns were invented, and more and more living things died.

In the past, people could only fight at close range using cold weapons such as swords, spears, and lances.

For long distances, they relied on bows and arrows or crossbows.

It takes at least six months to a year for an average person to learn archery, and at least three years for a qualified archer.

Moreover, archery requires a great deal of arm strength, which would eliminate most ordinary people from the competition.

In contrast, firearms can be mastered in just a few days, and becoming a qualified infantryman takes about one to three months.

Even women, the elderly, and teenagers can become qualified infantrymen with training.

And with the continuous development of firearms, whether it is humans, tigers, leopards, wolves, or elephants, they will all be killed by firearms.

Xia Weiwei never expected that this small piece of clothing could actually stop a bullet.

Even though it's just a pistol bullet, it's still incredibly powerful.

Ma Hongwei said, "The real strength lies in the insert plate, not the bulletproof vest itself."

Next, Da Mao in the video switched from a pistol to an AKS-74U assault rifle.

"Bang! Bang!"

He fired two shots, stepped forward, and said, "It's a bit off to the right, let's try again!"

"Bang! Bang!"

As Da Mao stepped forward, he said, "I'm really sorry, I accidentally turned it into full automatic mode just now, and both shots hit the board."

As he spoke, he reached behind the board, felt around, and removed the right side board.

A large hole appeared in the board.

"Was the board penetrated?"

With questions in mind, Da Mao removed the left-side panel.

The hole on the left side of the board is noticeably smaller than the one on the right.

"The fact that there are few pieces doesn't mean it wasn't breached; it's full of broken ceramic inside."

Da Mao picked up the board and tilted it on the tank, revealing a pile of grayish-black ceramic shards.

"ceramics?"

Upon seeing this, Xia Weiwei asked in confusion, "Shouldn't these bulletproof plates be made of steel?"

She originally thought that the bulletproof plates contained some kind of metal, which was why they could stop bullets.

"The earliest bulletproof vests were indeed made of metal, like the breastplates made of stamped steel plates used by various countries during World War I. However, these bulletproof breastplates could only stop pistol bullets and stray bullets at long range, but they were very bulky."

Ma Hongwei said, "The same was true during World War II. Whether it was the American or Soviet bulletproof breastplates, they could only protect against pistols."

"It wasn't until the 50s that the United States used soft body armor made of multiple layers of nylon, which was also for protection against pistol bullets."

"In 1965, the United States developed Kevlar material, which is five times stronger than steel but extremely lightweight. In the 1970s, Kevlar soft body armor was officially adopted, but it can only protect against pistols and submachine guns, not rifles."

"Next, there's the combination of a soft vest and a hard ceramic insert. These ceramics include alumina ceramics, silicon carbide ceramics, and boron carbide ceramics, all of which can withstand rifle bullets."

"When a bullet hits a ceramic shard, it shatters the shard. But because the ceramic shards break, it absorbs the kinetic energy of the bullet. The remaining kinetic energy of the bullet falls onto the soft back of the shard, which naturally cannot break it."

"oh oh!"

Xia Weiwei seemed to understand but not quite.

Let's reveal the answer!

Da Mao flipped both bulletproof plates over and said to the camera, "Look, none of them were penetrated. They were stopped by 5.45*39mm PS standard bullets."

"The one on the left looks better, with less damage and only a slight bulge on the back, while the one on the right has no bulge at all, just more ceramic fragments."

"Overall, they blocked both boards, so they did a pretty good job."

"Next up is the M855. It uses 5.65x45mm rounds, which aren't ordinary bullets; they're US Standard Level 3 armor-piercing. Let's continue testing!"

"Bang! Bang!"

Da Mao fired two more shots.

This time, the ceramic shards on the lower part of the bulletproof plate on the right also exploded, but the bullet did not penetrate them.

There was only one bullet hole in the left side panel, but the back was broken open.

"It seems that the less surface damage, the stronger the bullet's penetrating power!"

Xia Weiwei watched the video, her eyes thoughtful, and said, "This should be what you call kinetic energy, right? The more broken ceramic pieces on the right, the more kinetic energy they absorbed."

"That's right, exactly!"

Ma Hongwei nodded and said, "We can't just look at the surface. The greater the surface damage, the more successfully it stopped the bullet."

"However, the Russians' test was not very rigorous, because normally, these bulletproof vests are disposable, especially during testing. They should be replaced with one after each shot, because even if the bullets do not penetrate, they will damage the structure of the bulletproof plates."

Da Mao tried again, aiming the gun at a point slightly above the target. This time, the bullet was stopped.

This thick, white, soft material is made of ultra-high molecular weight polyethylene; Kevlar is a product from the past.

Da Mao said, "The edges of these plates are weak points and can be easily penetrated, so it's best to avoid getting hit on the edges."

After saying that, he picked up another rifle and introduced it: "This is an AKMS assault rifle with a folding stock. The bullets are 7.62*39mm standard steel-core bullets. Do you think it will penetrate if we keep shooting at it?"

Ma Hongwei said, "Although the kinetic energy of this bullet is not as high as that of the Type 38 rifle bullet, its penetrating power is much stronger."

"Within 150 meters, they can be killed by a single shot. But if it is more than 200 meters away, the lead bullets from the Type 38 rifle will not hit the internal organs, and the person who is shot will still be able to move. At 300 meters away, multiple layers of thick cotton clothing and earthen fortifications can stop them."

"On the other hand, steel-core bullets can tear soft tissue and shatter bones when they hit a human body at a distance of less than 400 meters, causing secondary injuries from bone fragments. Even simple fortifications and helmets cannot stop them."

"Bang! Bang!"

The gunshots this time were particularly loud.

Da Mao stepped forward, removed the board on the left side, and examined it: "You can see that there is a protrusion on the back, but it has not been pierced. This protrusion is right on the ribs. It will be very painful, but it can save your life."

"This time, the bulletproof capability should dispel many people's doubts, right? It's an obvious result."

"The right side plate was hit in the upper left corner, but the bulge on the back is still smaller than that on the left. I really like this plate; it's definitely more effective at protecting against bullets and also reduces the impact on the body."

"This experiment is still very meaningful, and it shows that you can't say that cheap products are no good. For example, the two bulletproof plates we tested were really cheap."