Perhaps Otani and others gathered in the store to let passers-by outside the window see the bustling in the store, and at night, passers-by nearby chose to come in and have a drink.

Although there are not many customers, it is a good start.

When it was almost twelve o'clock, the customers in the store had already left. Calculated that the closing time was not far away, Ye Qing simply closed the store door. After cleaning the store with Laili, he drove him back to the school dormitory.

Silver Eagle Federation at night is far less safe than domestic ones. Ye Qing doesn't want any accidents to happen to his employees. Especially Lai Li's down-to-earth and hardworking unlike most black people, and the healing smile on the corners of her mouth. In Ye Qing's opinion, it is undoubtedly his luck to recruit such an employee.

Ye Qing, who returned to the store, hurriedly washed up and lay on the bed, and his spirit entered the virtual training ground to continue his own study. Even though his body outside was extremely difficult, Ye Qing's spirit was regained when he entered the virtual training ground.

Until ten hours later, when he felt obvious fatigue in the training ground, Ye Qing then left the training ground and went directly to deep sleep.

The next morning, Ye Qing woke up and did not open the store directly, but lay in bed and recalled the content he learned last night. Thanks to the efficient and compulsory teaching brought by the system, Ye Qing's learning progress was very fast.

In terms of gun appearance modification, Ye Qing has been able to get started with most of the raw material processing. In terms of gun automation principles, Ye Qing can also understand the differences between short strokes of pistons and long strokes.

In general, the principle of automatic guns is mainly divided into four categories: barrel rear seat type, bolt rear seat type, air guide type and hybrid type.

In the development of world gun history, the manual machine gun invented by the Belgian Fashang in 1851 is undoubtedly the originator of automatic weapons. The rate of fire of 330 rounds per minute was shocked by the world.

It seemed like a coincidence. Thirty-three years later, in 1884, the famous Maxim heavy machine gun was launched. Since then, in 1892, Austria took the lead in developing the 8mm Schönberg pistol, which is also the world's first automatic pistol.

The automation of pistols and machine guns is much earlier than that of rifles, and the technology used in this is the barrel rear seat.

Simply put, the automatic way to use the gunpowder gas pressure in the gun chamber to make the moving parts in the gun recoil and complete the automatic action is the barrel rear seat type.

In this regard, Ye Qing only focuses on learning the short-barrel rear-seat type. Because the other branch, the long-barrel rear-seat type, has been abandoned by the times. However, the reliability of the short-barrel rear-seat type of gun, the smaller recoil, the higher shooting accuracy and theoretical high-fire rate can still be preserved.

The very famous 1911 pistol uses this structure.

The so-called short and long piston strokes I saw before belong to the category of air conductor. This automatic method is more used for modern guns and is also the main focus of Ye Qing's learning.

Looking back at this knowledge, Ye Qing couldn't help but think of the ar-15 exchanged from the system. The exaggerated performance has always made Ye Qing feel resentful.

Looking at the time on the watch, there was still an hour before the door was opened. Ye Qing could no longer help but be curious. He stood up and went downstairs to find the gun bag containing the ar-15, and took it to his room to open it.

Remove the magazine, open the upper cover, drop the stock, then remove the re-entry spring and the guard outside the barrel, and finally remove the moving parts inside the barrel and the gun body.

Combined with the knowledge taught by the system, Ye Qing is not difficult to recognize. There is no obvious difference in the automation structure of this Ar-15. The extremely long air guide chamber extending from the edge of the barrel and the piston stroke that is almost synchronized with the bolt moving track, all indicate that the gun is still a piston long-stroke rifle.

Even the locking mechanism is no different from the roller locking designed by Mr. Stoner. So the question is, why is the gun produced by this system so much more efficient?

As the saying goes, Zi is not talking about strange powers and chaotic spirits. Although his system is already very fantastic, after getting along with the system for several months, Ye Qing gradually understands that this system will not cheat for himself for no reason. In other words, the help it rewards him or provides him with purpose, and he still needs to pay a certain price.

It’s like the performance of the gun produced by the system has been improved by leaps and bounds. The guns purchased in your own store are still mediocre. If the system improves the performance in some ways that you can’t understand at all, then there is no reason why other guns in the store have not enjoyed this.

Thinking of this, Ye Qing went downstairs again and found a Ar-15 produced by Colt Company in the warehouse. After unboxing, he washed away the gun oil first, and then disassembled the gun step by step. At the same time, he placed it on the same desktop as the Ar-15 produced by the system for comparison.

One gun is on top and the other is on bottom. With such an intuitive comparison, and Ye Qing's method of comparing one component to compare one component, he quickly found the difference between the two.

The system-produced ar-15 has one more component!

Looking at a component that looked like a small funnel placed on the table, Ye Qing frowned and fell into deep thought again.

Needless to say, the Colt Company's Ar-15 has nothing suspicious about the direct blowing air-guided structure. After all, this old gun from the last century has passed the property protection period. You can find the design structure of this gun by just a casual search online. This part will definitely not be on the original Ar-15.

After clarifying this idea, Ye Qing continued to recall the previous process of dismantling the system version of Ar-15 in his mind. About three minutes later, Ye Qing finally thought of it.

"A funnel is added to the air guide chamber?"

Ye Qing muttered in confusion. The gas power generated by the explosion of gunpowder in the gun chamber is not small. If such a funnel-shaped thing is added at this time, will it cause excessive pressure on the inner wall of the gun chamber and the risk of explosion?

While pondering, Ye Qing loaded the rifle. Yes! Material!

After installing the rifle, Ye Qing remembered another point that almost got ignored by the system version of the ar-15, which was the weight issue. The normal ar-15 cover and the gun body were heavily used with aviation aluminum. This material was not heavy at first, but the system version of the ar-15 felt the same material, but the weight was much lighter.

Thinking of this, Ye Qing also understood the difference between the two. One is structural changes, and the other is the application of new materials. If you want to achieve the first point, you must make a breakthrough in the second point, that is, the material. Otherwise, suddenly adding a gas-gas-gased component to the gas guide chamber will only backfire.

In this way, it can be inferred that the hardness and toughness of the materials used on the system gun must be higher than that of ordinary aviation aluminum. So, is it another business opportunity?

No, there should be another course in materials science, and there is also a need to learn chemistry...

Ye Qing suddenly doubted life...

I'm afraid this system has to be renamed Xueba System. In addition to collecting a lot of money at the beginning, it seems that I have been learning it all the time. The promised plug-in life is just a high-tech cram school...
Chapter completed!