Chapter 166: Build a Gun and Start the Firearms Technology Tree!

Six hours of trading time, as soon as three o'clock in the afternoon arrived, as Su Mo stepped out of the light gate, the golden light behind him shattered in twenty or thirty seconds.

The light gradually turned into light spots, fell to the ground, and merged into the snow pile.

Except for the shelter, the supplies that were piled up like a mountain at this time, the depression once again returned to its former tranquility.

3200 units of iron blocks, divided into two layers, have been densely spread around the underground shelter, covering an area of ​​about three or four acres.

The same is true for copper blocks, which are neatly stacked on the left side of the underground shelter and lying on the ground.

With the current storage area of ​​the underground shelter, these supplies cannot be stored even if they are doubled, and can only be temporarily piled outside.

"It's great, in the depression, others can't detect that I have so many neighbors here, and I don't worry about being stolen if I store them outside."

Walking on the iron blocks, with the vigilance of Oreo, Su Mo is not afraid of someone coming to the shelter to steal resources.

Even if there is, they can't take much away at a time with just the pitifully small storage space, so there is no need to worry.

After using the storage space to move all the outer steel into the garage, Su Mo picked up five units of copper blocks and went to the second floor nervously to turn on the generator.

After days of adventures and running around, he almost lost his life to get back the supplies.

Finally, on the last day, it turned into strength!

Looking at the small thermal weapon laser manufacturing tool machine that has started to connect to the self-test, Su Mo is excited.

The steps to use the laser tool machine are not difficult. After adding the magical modular technology, the manufacturing has been simplified a lot.

You only need to click on the weapon you need to make first, and then put the required materials into it according to the needs. After passing the tool machine inspection, you can perform the fool-like placement operation and wait quietly for the finished product to come out.

"Modular technology is indeed a good thing, but it's a pity that we didn't acquire any modular machine tools this time."

"But even if there are, these people may not sell them unless they are dying."

Shaking his head, he put away some greedy thoughts. Seeing that the green light had turned on after the self-test, Su Mo gently selected the M-1 rifle, and the material requirements popped up.

Three units of steel, two units of iron, one unit of copper, one unit of wood, two units of water, and

Ten degrees of electricity!

The machine tool also has its own battery module, which needs to be fully charged first to ensure that it is higher than the manufacturing value before it can start.

This is a requirement for the possibility of manufacturing failure or machine tool damage caused by sudden power outages.

Seeing that the lower right corner has started to charge quickly, Su Mo is not in a hurry and sits patiently in front of the machine tool and waits.

The manufacture of firearms involves some seemingly simple but actually complex specifications. For example, rifling manufacturing is a very simple and very important part.

Rifling, also known as rifling. Because its cross-sectional shape is similar to a windmill, it is also called windmill line.

Rifling can be said to be the soul of the barrel. The function of rifling is to give the bullet the ability to rotate, so that the bullet can still maintain the predetermined direction after leaving the barrel.

Although there are records of the use of rifling in the 15th century, it was not popularized until the 19th century due to the difficulty of manufacturing technology.

Without relevant knowledge reserves, Su Mo can only hope that the machine tool is powerful and does not make mistakes!

Half an hour later, the charging is completed. Looking at the manufacturing button that pops up on the side of the machine tool, Su Mo's face is sacred. He gently puts all the materials into the storage module of the machine tool, which currently has only one square meter. He presses the manufacturing button with both hands and starts the first production of firearms!

Creak! Creak!

The harsh sound is accompanied by a slight tremor. As the button is pressed, it begins to burst out from the machine tool from the inside out.

A creepy high-pitched cutting sound not only scared Su Mo, but also scared the sparks on the second floor.

The laser probe above began to rotate slowly under the power of the machine tool.

Before Su Mo could take a good look at how the machine tool made weapons, an iron cover suddenly rose from both sides of the machine tool.

Driven by the motor, the cover began to slowly form a sphere, leaving only a few heat dissipation holes, completely covering the entire machine tool.

Then, a dazzling light suddenly burst out from the heat dissipation holes of the cover, illuminating the laboratory with unusual brightness.

The high temperature brought by the laser cutting began to float out through the heat dissipation holes.

Gradually, seeing the temperature getting higher and higher, Su Mo simply summoned the lion's wind to start cooling the big iron ball.

After five minutes of this cycle, the light began to weaken.

Puff!

With bursts of water vapor, the cover began to slowly fall, revealing the true appearance inside.

At this time, where the finished product popped out, there was already a freshly baked gun with a distinctive shape and extremely aggressive.

From the head to the tail of the gun, carefully looking at the gun body, at this moment of harvest, Su Mo calmed down instead.

When the green indicator light came on again, indicating that Su Mo could take the gun, the temperature of the M-1 rifle also dropped and reached a stable temperature.

Picking up the gun, Su Mo first felt the weight.

"It's not heavy. The weight of an empty gun is about five pounds. With bullets, it should be between six pounds and six and a half pounds."

After removing the magazine, Su Mo looked at the capacity.

The bullet specification of the magazine is 56 x 45 mm, and it uses a STANAG magazine similar to that on Earth, with a standard capacity of 40 rounds.

"If you ignore the name and the different pattern design, it is really a pirated M4A1."

Touching the complex pattern on the gun, Su Mo was not sure about its power, so he could only try to open the machine tool to make ammunition.

The M-1 rifle uses the M193 rifle bullet, which is the conventional 45mm caliber. This small-caliber rifle bullet has a huge lethality that is disproportionate to its size.

The M193 bullet has no steel core, and the bullet is filled with soft lead. The copper skin wrapped around the bullet is very thin, so the entire bullet becomes very soft.

After hitting the target, the bullet will quickly deform and break, and the bullet fragments will form multi-channel penetration wounds (that is, a bullet punches several holes), causing severe bleeding.

However, the technology tree of firearms is not as simple as simply making guns.

The biggest problem facing all wasteland humans at present is the preparation of ammunition.

Even if the underground shelter is currently well-stocked, if you want to make suitable bullets, you still need to continue to point out a new technology tree

Smokeless gunpowder!

Black powder burns slowly and has low pressure, so the bullet has a low muzzle velocity.

In order to achieve sufficient range and effect, simple physics determines that the mass of the bullet needs to be large, and the bullet bore diameter is naturally larger.

Therefore, rifle bullets of more than ten millimeters or even 20 millimeters are everywhere in the black powder era.

In order to achieve better results, in the late black powder era, the chamber pressure was increased by loading compressed black powder, which could also provide a speed close to that of smokeless gunpowder.

When smokeless gunpowder burned faster, the pressure and temperature were higher, which brought faster speeds, reduced the caliber and mass of ammunition, reduced the logistical burden, but also brought countless design changes.

Smokeless gunpowder brings smaller ammunition calibers, faster speeds, and straighter trajectories.

A straighter trajectory means less impact from distance errors.

For example, in the trench warfare of World War I, it was common to hit the exposed head at about 300m, and it was very likely that a difference of tens of meters from the zero point would cause the bullet to hit high or low.

A straighter trajectory can reduce the trajectory height error caused by distance, making it easier to hit the target.

"The preparation method of smokeless gunpowder in the TV series Hanyang is a bit exaggerated, but there are also reference points."

Putting the M1 rifle on the work table, Su Mo began to think carefully about how to mass-produce smokeless gunpowder.

If the development of the ammunition technology tree is not promoted, no matter how awesome the gun is in the future, it will be useless without bullets.

"Nitrocellulose, the production process of guncotton is not troublesome, but the right cotton is a problem. Later, you only need to soak the guncotton with ethanol and ether, and dry it to get smokeless gunpowder."

"Ethanol and ether are also not difficult to prepare. Ethylene can be extracted from petroleum, and ethylene can be used as a raw material for making ethanol. Ethylene can be obtained by hydrolysis, and ethanol catalytic reaction can get ether."

Finding a piece of paper, Su Mo tried his best to recall the few chemical knowledge and pieced it together with the TV series to complete the seemingly correct idea of ​​making smokeless gunpowder.

A flash of light, after a systematic appraisal, it was also determined that there was no problem with this design drawing at all, and the idea was correct.

"So, the last difficulty is cotton? If you want to make suitable guncotton, the quality of cotton is very important!"

In the TV series "Hanyang Zao", Xu Jianyin once presided over the research and development of sulfuric acid in Tianjin Manufacturing Bureau, solving the problem of relying entirely on imports of sulfuric acid at that time.

It was because of his outstanding talent that Zhang Zhidong dug him to the Hanyang Steel and Pharmaceutical Factory to be responsible for the production of ammunition.

One of the main raw materials for making gunpowder is cotton. In his research, Xu Jianyin found that there was a big difference between domestic cotton and foreign cotton.

Therefore, during the domestic trial production, the temperature, humidity, time, pressure, liquid concentration, etc. should also be changed accordingly. Perhaps this is the main reason for the failure of the Jiangnan Manufacturing Bureau.

In order to quickly find a production method suitable for China, Xu Jianyin "used a pestle and mortar every day to personally refine it."

In just half a year, a sample of smokeless gunpowder was finally produced.

After testing, the effect of the sample is completely comparable to imported smokeless gunpowder.

This also indirectly shows that as long as the right cotton is found, the right smokeless gunpowder can be refined in a very short time.

"System, how many survival points are needed to create a pound of cotton used to make gun cotton!"

There was no rush to purchase in the market. After opening the system panel and clicking on the creation interface, Su Mo first recorded the system's needs.

This price is not low, but not high either.

65 survival points can be exchanged for a pound of cotton used to make gun cotton, 300 points can be exchanged for a pound of prepared gun cotton, and 520 points can be exchanged for a pound of developed smokeless gunpowder.

A bullet needs to be filled with about 2g of bullets, and one pound can be filled with 260 bullets. After conversion, directly exchanging for gunpowder, the cost of a bullet is close to 2 survival points, which is too bad!

"No, I want to equip bullets in the future, and I must have a suitable production line. I will directly purchase cotton and practice by myself!"

Thank you for your monthly tickets. The defense is finally over. The update can be brought up after May Day. I am really busy these days. Fortunately, I have your support. Love you!