Lei Zhen was stunned, the system is really generous, and even the authorship of this blueprint is given to himself.

He didn't do anything to become the inventor of a rifle-sniper dual-purpose gun that had never appeared before.

"Awesome!" Lei Zhen opened the drawing and glanced at it, but he didn't understand anything, but there was a hint of realization in his heart.

The core of the so-called infantry and sniper dual-purpose guns is that the barrel is retractable.

In the shrinking state, it can fire an ordinary 7.62 mm caliber bullet, which is suitable for the specifications of ordinary rifles in China, but when the barrel is extended, the caliber of the barrel will also become a little larger, which can just adapt to the existing tungsten steel bullet specially equipped with the domestic 10 high-precision sniper.

The initial velocity can reach hundreds of kilometers per hour, and at this speed, the possibility of air disturbance is greatly reduced, which greatly improves the accuracy of sniping.

To achieve such a requirement, the requirements for precision are high.

"Hey, throw the drawings on there, let me see them too," Ye Qingtian said.

"Can't you see the same from me?"

"There's no air conditioning, it's heated here, and there's a smell of engine oil on your body, who's standing next to you!" Saying that, Ye Qingtian walked upstairs and appeared in front of the floor-to-ceiling window.

"I'm going to enjoy it," Lei Zhen shook his head.

Ye Qingtian is a strong person who has experienced being roasted under the little sun for a long time, and it cannot be said that she can't endure hardships.

"Hey, put the drawings on the projector!" Ye Qingtian kicked the glass twice with his foot and urged, "I want to see it too!" ”

"Yes, Miss!" Lei Zhen pouted, Lei Zhen threw the drawings on the projector and flattened them.

Lei Zhen first selected materials from the pile, and as soon as he came up, he grabbed a wrist-thick titanium alloy tube and put it on the lathe.

Lei Zhen didn't need to make any judgment on this choice, the system had already made the best choice by manipulating his hands and feet.

Titanium alloys are strong, lightweight, and do not require much thickness to withstand extreme weights.

The processing is a bit difficult, but with so much advanced equipment here, this problem is solved.

Put the thread mold on the lathe, Lei Zhen clamps the titanium alloy tube, and then lets the rotating titanium alloy pipe touch the mold to make a beautiful thread.

"It's a good thing to do," Ye Qingtian leaned lazily on the sofa with Erlang's legs crossed, looking at all this lazily.

"Xiao Yezi, why are you here, there is no project today, take a good rest, tomorrow will be your first training as a wolf tooth warrior!"

Tang Xinyi pushed open the door of the office and saw Tang Xinyi leaning on the sofa, and couldn't help asking.

"Huh? Don't you even take a break? Didn't you say yes, there's family leave or something? ”

"Of course there was in the past, this year's situation is really special, among the soldiers who have been selected, you see that there is one who is not related to our wolf teeth, and he will visit the chicken!" Tang Xinyi was quite casual in front of Ye Qingtian, "Eh, what are you looking at?" ”

"I guess who's better at sniping than Lei Zhen, you know......"

"Of course, as a result, you didn't compare, so I didn't continue to pay attention to you," Tang Xinyi nodded hurriedly.

"Lei Zhen's grandson said that he wanted to build a DIY rifle, and even the drawings have been drawn, isn't he doing it now!" Ye Qingtian pointed to the workshop under the glass window, where Lei Zhen was sweating profusely cutting metal pipes.

"Rifles?" Tang Xinyi glanced at the large-screen LCD TV, and then her eyes became a little wrong, and she didn't speak for a long time.

"Aunt Tang? Aunt Tang, what's wrong with you? Ye Qingtian asked in surprise.

"It's a very enlightening idea, for a private school student like Lei Zhen, it's a genius approach!" Tang Xinyi said with a smile.

"Was this Lei Zhen's own design?" Tang Xinyi then asked.

"Well, it's his name on the drawing, and his idea is too nonsense, no designer would do such a thing, right?"

"No, it's doable, it's totally doable! And the method of realization has appeared hundreds of years ago," Tang Xinyi was shocked as if she had seen a new continent, "Wedge mechanism, why didn't I think of it?" The caliber of the gun is completely changeable! ”

"Aunt Tang...... You're saying that this gun made by this kid Lei Zhen is completely feasible? Ye Qingtian swallowed his saliva.

"No, after all, it's just a sketch, and many things are not perfect, such as the calibration of the sight and so on, which is definitely not something that he can do as an untrained kid!"

"But...... has such a talent at a young age, if he is left at the Institute of Future War Research for a period of time, will he be able to become even stronger? ”

"Quick, Lei Zhen stop quickly, don't practice the materials, I'll call the engineer to do it for you," Tang Xinyi pressed the button of the microphone and said to Lei Zhen.

"Huh?" Lei Zhen raised his head when he heard the voice and saw Tang Xinyi.

"Aunt Tang, don't worry, I'm doing it very well, you see that these two barrels have been able to retract on their own," Lei Zhen held the barrel and smiled, "I have finished processing the five barrels, and the assembly is going smoothly, I don't need help from others, lest someone say that I can only rely on engineers to do things!" ”

Lei Zhen took a slightly thinner titanium alloy tube, put it into the newly assembled alloy tube, and fixed a screw.

Lei Zhen raised the assembled titanium alloy tube and smiled at Tang Xinyi: "Auntie, look, I'm still doing a good job, right?" ”

"But can you do the machining of the other five titanium alloy tubes with variable inner diameter? It's up to the engineers to deal with such a complex structure! ”

"It's fine!" Lei Zhen took an alloy pipe, walked over to the hydraulic cutting machine, and turned on the cutting machine switch, "I can hold it!" ”

Lei Zhen's hand rotated precisely, and he asked the waterjet to cut out a precise piece of metal on the alloy tube.

The speed was very fast, but it took more than half an hour to divide thousands of pieces of metal into the table.

Tang Xinyi stood there for more than half an hour, Lei Zhen's movements were really skillful, so familiar that people felt that this was a master who had honed his skills in the factory for more than ten years.

But she knows Lei Zhen clearly, Lei Zhen is mainly practicing track and field in school, how can she have time to work in the factory!

"Hell, this kid is amazing!" Tang Xinyi's face became solemn, she entered the background of the monitor, found out the picture of Lei Zhen when he started to make it from the data backup, and made an additional backup.

"Aunt Tang, sit down, aren't you tired standing like this?" Ye Qingtian hurriedly said.

"I have to watch, Xiao Yezi, you don't understand, how clever Lei Zhen's technique is," Tang Xinyi's eyes did not take his eyes off at all, but continued to look carefully.

And at this time, Lei Zhen has already begun to assemble the variable barrel!