When the first broken bullet appeared in front of the US military officer, the US military just felt that it was a little fake, because the previous promise was too high, and if it could clearly explain the situation of that weapon, it would get first-class credit, some breakthrough provisions, and even a level of promotion, which was a temptation for most of the US military, you must know that although the US military has expanded, the boundary between officers and soldiers is still quite large, take Tom as an example, a sergeant like him, he has been in the army for more than 7 years, It took a gradual evaluation to reach this level, and then in this battle, he made 6 great achievements in a row, and then there was the possibility of improvement. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

This time, in order to figure out this weapon, the U.S. military has made great efforts, helpful clues, at least it will be credited, and the maximum can be directly upgraded, a warhead of this weapon is a breakthrough for this weapon, at least it is also a special merit, if it is slightly relaxed, it can be upgraded directly, which is a huge temptation for the U.S. military, especially those sergeants?

Could it be that these sergeants, in order to upgrade, brought machine gun bullets, looking at the shape of this warhead, it looks like a machine gun with a larger caliber. However, when they really got their hands on it, they found that these things are not simple, and it is not easy to make these bullets what they are now, and this is not the same as the Japanese weapons that the US military has mastered, none of which are like this, at least, this is a new weapon, whether it is a weapon or not, it is always an aspect of understanding Japan.

The size of such a weapon is the same, the color is the same, the shape is similar except for the size, if he is a weapon to attack the tank, it must meet certain conditions, in this case, the US military still did a certain amount of work, and tested such a wreckage, which can produce such a big blow to the armor of the tank, under the premise that his hardness should be extremely high.

On the battlefield, there is no precision machinery, it is impossible to test it in a short time, what is the specific hardness of this kind of thing, but the hardness of the test, the general analysis is still OK, in the barracks, at most it is steel, if there is only one such specimen, these US troops may not be willing to give up, but when there are 10, 20, or even 30 such specimens, it seems that it is no problem to waste one or two.

The U.S. military found all the hard steel it could find, ordinary iron blocks, high hard steel, machine gun barrels, mortar barrels, 35 mm artillery barrels, 80 mm artillery barrels, 108 mm artillery barrels, as for the new 155, forget it, he can only be regarded as a stupid big thick at most, it is tactical, and the hardness of his steel is even inferior to the barrel of 80 mm guns, even if it reaches that level, it can reduce the weight of the artillery a lot, but in terms of production difficulty and time cost, It is enough for the United States to abandon this idea.

After entering the wartime, the steel production of the United States increased significantly, and has exceeded 40 million tons. The output of iron also exceeded 120 million, in this sense, under the premise of enough steel, there is no need to be so frugal, when the front line is 100,000 urgent, the difficulty of production has become the key, which is also the fundamental reason why the US military can concentrate tens of thousands of tactical artillery and share the same color with Japan on the front line in Juneau during a period of time.

The test hardness is very simple, scratch it, this is also a test method of the world hardness standard, in fact, the hardness index is according to the diamond for ten, according to the diamond on various objects, the formation of scratches, according to a certain proportion to determine the hardness. Substances with high hardness can draw scratches on substances with low hardness, and according to the depth of the scratches, the hardness index can basically be determined.

There is a very simple way to distinguish jadeite with future generations, that is, scratch on the glass, smooth can not draw scratches, it must be fake, can produce friction, and then produce scratches, it must be true, the reason is that the hardness, the hardness of the general glass is about 5-6, but the hardness of jadeite is between 6.5 and 7.5, the more precious jadeite, the hardness will generally be greater.

In the past, the U.S. military had simply assessed the strength of armor-piercing bullets, there was no specific number, this hardness is basically greater than the hardness of most of the steel they know, these picked, has been able to find by the U.S. military, currently in the barracks, the hardness distribution is relatively large, as long as the hardness of this steel exceeds them, it proves that this wreckage is likely to be the kind of weapon that attacks the tank, at least one of the evidence, because ordinary weapons, there is no such hardness at all, Penetrate a few people, and still have lethality, which is more than powerful in the machine gun.

The test is very fast, and it is not a formal test, it is necessary to avoid external force, a few people hold the wreckage, and scratch it on other items, obviously, such a kind of steel, their hardness is very large, even in the case of deformation, it can easily produce scratches on other steel, especially ordinary steel, his coefficient is very low, and it is easy to scratch a huge trace, and the experimental material is not damaged.

This deformed wreckage, which does not look so ferocious, is the culprit of the destruction of a large number of tanks, and even the battle carefully prepared by the US military was basically lost in the hands of such a weapon, but why is he so small?

The Americans quickly confirmed that this should be the kind of weapon that should be used against tanks, but instead, they turned their focus to why the weapon is so strong, among the wreckage picked up by the American army, the largest is only less than 40 millimeters, and the smallest is only less than 15 millimeters.

Especially after asking those American soldiers, most of the wreckage of this part has been deformed, but considering his power, after penetrating the armor of the entire tank, after killing four or five, seven or eight people, he still maintains the same appearance as before, which is enough to shock people, from these small deformations and collisions, you can imagine how powerful this weapon is.

Luckily, a soldier brought back a complete wreckage, which probably didn't hit any target, and gradually lost speed during the flight, and finally fell into the dirt, because it didn't penetrate any armor or human body, and the warhead was intact.

The appearance of the machine gun bullet, the caliber is only 12.7 mm, which is much smaller than the caliber they expected, the appearance and hardness of the metal are exactly the same as those tested before, it is certain that this is the same bullet, the unique design, is specially set for armor piercing, but to a certain extent, he is more hardness than all the high-hardness alloys of the current US Army, this is part of his power, only such a strong alloy material, can be driven by speed, easily through the tank armor.

According to other side information investigated by the U.S. military, such a weapon, when attacking, there is no sound at first, that is, the sound will arrive later than the bullet, according to the speed of the sound of 400 meters per second, the speed of this armor-piercing bullet is very amazing, the combination of hardness and speed, no wonder can easily pass through these tanks.

More and more intelligence is collected, and the US military feels more and more the strength of this weapon, when the low-level officers put all the clues that came out of the inquiry, put together and handed them over to the high-level, no one at the top of the US military command dared to believe it, they had thought before, this weapon against the US tank, maybe it is a small caliber, but this is just thinking, a huge weapon, can also reach such a small caliber, 40 mm can still do this, 12.7 mm to do, you can imagine, In a gun of the same caliber as 155 heavy guns, in a tenth of the position, open a small, only 1.5 centimeters empty, not to say that such a waste is meaningless, just to say that this weight, is unimaginable.

A round stick that is almost 155 mm, and even with the outer diameter can reach 18 cm, or even 20 cm, what is his weight, take the barrel is 2 meters, and his weight is close to 500 kg, which will have a huge impact on the center of gravity of an artillery.

Unlike 155 caliber artillery, large-caliber artillery has enough space, and it would be good to thicken the barrel, and if the small-caliber artillery thickens the barrel and thickens it to the extent of a large-caliber gun, this is tantamount to more than worth the loss, a gun is about the same weight as a gun above 100 mm, but the caliber is only 40 mm, or even 15 mm, which is completely meaningless.

But to look back and think that Japan has completed such a weapon on a less than 15 mm machine gun, which is even more unbelievable, because the material requirements for this weapon have almost reached the level of perversion, and the US military cannot achieve such strength even on the 155 mm gun, and it will be even more difficult to achieve it on an ordinary machine gun.

On the Juno front, there are not many weapons experts, but there are also some weapons engineers, maintenance personnel, they know the approximate initial velocity of such a weapon through simple calculations, 1000 meters is just a rash estimate of the initial velocity, but this initial velocity, for the United States, is simply unimaginable, just kidding, if a weapon wants to achieve such an initial velocity, the increase in the explosion will reach a certain extent, not to mention that such a small shell, can be loaded with so much gunpowder, Just to withstand such a strong initial velocity, how strong is this barrel? (To be continued.) )