In the past few days, Zhang Yunfei arrested Zhang Yuxin and Zhang Chu and several of them as his assistants, after all, one of the six of them studied civil engineering, Zhang Chu and the other two men studied mechanical engineering, and Zhang Yuxin studied electronic communications.

And Zhang Yuxin was used by Zhang Yunfei as a personal assistant, except for sleeping at night, he took Zhang Yuxin with him the rest of the time. The current Zhang Yuxin is also dressed in eight ways, looking heroic and attractive.

During this period, Zhang Yunfei and Zhang Yuxin's cooperation is also becoming more and more tacit, sometimes Zhang Yunfei has a look, Zhang Yuxin knows what to do, of course, Zhang Yunfei also took advantage of his work to rub some oil, such as holding small hands and hugging his waist, but if he goes further, it will cause Zhang Yuxin's eyes to roll his eyes.

A month later, the special combat team members began to return to Xin'an County one after another, bringing back hundreds of skilled workers and professional and technical personnel.

According to the special combat team members, this old engineer who is close to the armor is a national treasure of the Taiyuan Arsenal in the past, and the old engineer's name is Xu Kaixian, who studied in the United States for many years in the last years of the Qing Dynasty, and after returning to China, he was recruited by Yan Xishan with a high salary to come to the Taiyuan Arsenal to engage in the design and development of weapons, and he has been working in the Taiyuan Arsenal for nearly 20 years. Not long ago, he was found by special combat soldiers in Taiyuan, and when he heard that he was coming to work for Balu, he immediately agreed to come over.

With the addition of these skilled engineers and technicians, the construction of the Huanglongxia Arsenal, which was almost coming to an end, was completed in less than a week, and Zhang Yunfei followed Xu Kaixian's suggestion and divided the factory into several large workshops, each of which was a workshop, and established a weapons design and research institute. Xu Lao was appointed director of the institute and chief engineer of the arsenal.

For the products of the Huanglongxia Arsenal, Zhang Yunfei has already thought about it, and combined with the current actual situation, he mainly produces the following products.

In terms of artillery, due to equipment limitations, it was not possible to produce large-caliber artillery, so it was decided to imitate the Type 92 infantry gun of the little devil.

Among the weapons of the little devils, other weapons have design defects, and there are various defects, such as the shortcomings of the 38 big cover with low lethality, which often produce penetrating injuries when hit on people, and it is difficult to kill with one shot if they do not hit the vital point. Crooked handles often jammed, and the rate of fire of the Type 92 heavy machine gun was too low. Only the Type 92 infantry cannon of the little devil can be called an excellent weapon in this era.

The Type 92 infantry cannon is a very excellent weapon in the army's armament, known as "one inch short, one inch dangerous." It was an 'ideal' infantry battalion support weapon in the thirties of the twentieth century. This is especially true for countries with very low levels of mechanization.

Plus, it's perfect for use on complex terrain. For example, for infantry battalion support in mountain warfare, it is very handy. Moreover, it has a wide range of tasks, and can cover almost all types of fire support required by an infantry battalion. Coupled with the simple structure, it is not only convenient for wartime production, but also easy to use and maintain.

The total weight of the Type 92 infantry gun is only 0.212 tons, so the requirements for transportation are very low, and in the absence of vehicles, untrained animal power or manpower can be towed forward. It can be said that the Type 92 infantry gun is an infantry gun that can truly accompany the infantry battalion in combat unconditionally.

In view of these, after thinking about it again and again, Zhang Yunfei decided to imitate the little devil's Type 92 infantry gun, and it was an imitation, so that the production process would be much faster.

As for light weapons, Zhang Yunfei decided to pirate the AK-47 automatic rifle that had not yet come out in this era, as an excellent special soldier in later generations, he was very familiar with various weapons, and the AK-47 automatic rifle was highly evaluated in later generations, Zhang Yunfei naturally paid attention to and understood it, and the real gun was disassembled and used many times.

The individual indicators of the AK-47 automatic rifle are not outstanding, but the comprehensive surname can be very balanced, the structure is simple, strong and durable, there are few failures, the cost is low, and the power is huge.

The receiver and many accessories are produced by stamping process, and the advantage of using stamping process is that the material consumption is low and the production efficiency is high, so that a large number of equipment can be produced, which is one of the reasons why Zhang Yunfei chose the AK-47 automatic rifle.

In addition, the effective range of the AK-47 automatic rifle reaches 300 meters, which is basically the same as the range of rifles of this era, and the infantry squad can basically not be equipped with a crooked machine gun, unless a more advanced and better machine gun appears, of course.

It took several nights, and after repeated revisions, Zhang Yunfei finally drew the basic drawings of the AK-47 automatic rifle, why do you say that it is the basic drawings? Because Zhang Yunfei can only draw the basic mechanism and basic principles of the AK-47 automatic rifle, as for some specific details, such as some key dimensions, fits and tolerances, etc., there is nothing he can do, but I believe that Xu Kaixian and a group of other professionals will spend a certain amount of time to figure it out.

When Zhang Yunfei put the drawings in front of Xu Kaixian, Xu Kaixian was extremely shocked, he has been engaged in weapon research and development and design for almost a lifetime, and it is the first time to see such an ingenious weapon, he has a feeling that this kind of gun is definitely a big killer, such an excellent weapon is made in his own hands, and he has no regrets in this life.

Seeing that Xu Kaixian's face was flushed with excitement, and his hand holding the drawings trembled slightly, Zhang Yuxin also knew that this must be an epoch-making weapon, and Zhang Yunfei's eyes began to be different, and his eyes were full of little stars.

Originally, for several nights in a row, Zhang Yunfei asked Zhang Yuxin to cooperate with the drawings of this rifle, Zhang Yuxin had complaints, every time after 12 o'clock in the evening, Zhang Yuxin didn't sleep well in the past few days, and he was about to have dark circles under his eyes.

In fact, when Zhang Yunfei was drawing at night, Zhang Yuxin couldn't help a lot, nothing more than pouring some tea, laying paper, and handing a pencil ruler or something.

Seeing Xu Kaixian's excited appearance, Zhang Yunfei's heart finally fell, and it seems that this AK-47 automatic rifle should be able to be built. But Zhang Yunfei still asked: "Old Xu, is this gun sure to be manufactured?" ”

Xu Kaixian calmed down his excitement for a while, and said affirmatively: "I am sure that I will make it, this drawing is very clear about the basic mechanism and basic principles, and we can calculate and make up for the missing size, we will work overtime to paint, and in about half a month, the prototype of this gun can be manufactured, and it can be mass-produced in a month." ”

Seeing that Xu Kaixian was so sure, Zhang Yunfei was also very happy, and said solemnly: "Then please, I will wait for your good news." ”

After that, Zhang Yunfei and Xu Kaixian exchanged some views, and then visited the entire Huanglongxia Industrial Zone, and now the whole industrial zone is roaring with machines, a hot scene, the workers are working hard, and several Type 92 infantry guns in the artillery workshop have begun to take shape.

It took Zhang Yunfei almost two hours to return to the headquarters of Xin'an New Town from the industrial zone, which was the result of Zhang Yunfei riding a three-wheeled motorcycle, and it was estimated that it would take a day to walk on foot.

At present, a 5 or 6 meters wide gravel dirt road has been repaired, from Xin'an New Town to Huanglongxia Industrial Zone, there are 5 checkpoints on the road, whether it is in or out will be checked layer by layer, Zhang Yunfei near the industrial zone is sent a battalion of troops to guard.

Time always flies quickly in the busyness, during this period of time Zhang Yunfei is mainly busy with the training of soldiers, and sometimes goes to the recruit camp to guide the training, now Zhang Yunfei has recruited almost 2,000 people, set up two new battalions, and now the new veterans of the 719 regiment together are almost 5,000 people.

Now the training live-fire training has increased the intensity of training, and each soldier can shoot 20 rounds of ammunition a day, and everyone's shooting level has improved rapidly.

With the successive commissioning of the workshops of the Huanglongxia Arsenal, the ammunition of the troops is also sufficient, and the ammunition production workshop can produce several hundred thousand rounds of ammunition per month, and the output of artillery shells can reach 3,000 rounds per month. According to Xu Kaixian, the output of the ammunition production workshop will double in three months.

The first batch of 6 cannons of the Type 92 infantry gun was also manufactured two days ago, and through test firing, it is comparable to the Type 92 infantry gun produced by the little ghost.

Today, there is even greater good news, the prototype of the AK-47 automatic rifle has been manufactured, and through test firing, it has basically met Zhang Yunfei's expected requirements, and then through improvement, it can be mass-produced.

Today, the two shifts are over, and there is a third watch in the evening to thank you for your support.

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