Taking advantage of the fact that there was no one around, Xu Jianguo released Xu Yang, gave him a few instructions, and then walked towards the main entrance of the workshop.
He took out the key to open the padlock, opened the door and walked in, took out the four large wooden boxes that he had taken away last night and placed them in the corner, then went back to the inner room and continued to draw on the table.
Lunch was still eaten in the workshop. Except for going to the toilet, Xu Jianguo did not go anywhere else. This made people who were watching the workshop from a distance feel a little incredible.
"Director, that kid didn't even go to the cafeteria just like yesterday!" Niu Zhenghua said.
"Okay, I got it. Just keep watching!" Shi Zhen said.
He was now a little confused about Xu Jianguo. After two days of observation, the young lieutenant colonel's sleepless work attitude gave him a different feeling, as if it reminded him of himself when he was young.
At two o'clock in the afternoon, when the last drawing of a firearm accessory was completed, Xu Jianguo put down the pen in his hand and took a deep breath.
He stretched hard, took out the kettle from the space, unscrewed the lid and took a big sip. Then he put the drawings and the kettle on the table into the space and walked towards the operating room outside.
Now, all the manufacturing processes of the two firearms and their related accessories are in his mind. The next step is to turn the plan drawings into real objects.
Xu Jianguo came to the operating room and took out a 416 stainless steel pipe from a wooden box. This steel pipe had undergone preliminary processing and was originally intended to be used to make firearms, but the length was adjusted according to his requirements.
After looking at the steel pipe, Xu Jianguo purchased a set of instruments specifically for measuring ovality and straightness through the system mall. He then measured the steel pipe data and the results were good, which could meet his needs.
Next, he took out a special rifling broach from the tool box and began to make the rifling inside the barrel.
Hand-rifling requires very high technical skills from the operator. Fortunately, Xu Jianguo has proficient skills in firearms design, coupled with his proficient knowledge of mechanical maintenance and super strong physical fitness, so there is no problem in making it.
The Type 81 rifle has four grooves, but he did not intend to use the original layout. Instead, he chose the same six grooves as the later Type 95-1 rifle.
The rifling allows the bullet to spin and ensures its stability, so generally speaking, the more rifling in the barrel, the better.
Under the same conditions, the more rifling there are, the faster the bullet will rotate in the barrel, and the more stable the bullet will be during flight, thereby improving the shooting accuracy of the firearm.
However, while the increase in rifling improves the accuracy of the firearm, it also leads to an increase in manufacturing costs.
The most important thing is that the main function of an ordinary semi-automatic rifle is different from that of a high-precision sniper rifle.
As the soldiers' main weapon, gun designers not only have to consider the issue of shooting accuracy, but also need to consider various comprehensive factors that may arise on the battlefield, so as to achieve a balance in the performance of the gun in all aspects.
The main reason why AK47 is called a famous gun is that it has appeared in various combat environments. No matter what the battlefield conditions are, this gun can stably play its role and will not go out of service due to special environments such as dust, humidity, and extreme cold.
Simply put, for a semi-automatic rifle, in addition to the necessary effective range and accuracy, durability is also an important factor considered by the military.
Xu Jianguo chose six grooves, which was the most ideal state in his mind. If the superiors felt that the cost was too high, then changing to four grooves would not be impossible. After all, the Type 95 rifle also had four grooves, and it was not until the Type 95-1 that it was upgraded to six grooves.
He first used special tools to re-polish the inside and outside of the stainless steel pipe to ensure its curvature and flatness.
Xu Jianguo took some cotton cloth, wrapped the steel pipe, and then fixed it on the clamp. Then he began to use a broach to manually pull the rifling.
At this time, in a factory building closest to the workshop, a young man in charge of surveillance was holding a telescope and carefully observing Xu Jianguo's every move.
The young man, with a cigarette in his mouth, stared at Xu Jianguo's busy figure in the telescope with some boredom. As he watched, his mouth unconsciously became an O shape, and at the same time, he felt a little awe for the young lieutenant colonel.
As the saying goes, money can make a slave lose his back, and skills can make a trader lose his job. Although he is still an apprentice as he is a skilled worker, he has to admit that Xu Jianguo's skills are much better than his master's.
The young man even felt a sense of enjoyment. Looking at Xu Jianguo's effortless techniques and skillful movements, he didn't feel like he was watching someone work, but rather like he was appreciating a dance.
More than an hour later, Xu Jianguo completed the processing of the gun barrel. He took the gun barrel off the fixture, and then measured the data with an instrument. There was no deformation, so he nodded with satisfaction.
After making the gun barrel, Xu Jianguo did not rest, but continued to make the gun case.
He took the steel ingot out of the wooden box, drew lines on the ingot with a special pen, and then went to the milling machine and began to perform preliminary processing on the surface of the ingot.
Soon, it was five o'clock in the afternoon and the bell for the end of get off work rang in the 523 Institute. As the workers and engineers left, the entire institute became quiet.
At 5:20, Xu Yang walked in. Xu Jianguo looked up and put the newly processed gun case parts and the finished gun barrel into the space before asking, "Is he gone?"
"Yes, young master!" Xu Yang said.
"Okay, let's go too!" Xu Jianguo said.
After putting the four large wooden boxes into the space, Xu Jianguo turned off the lights in the room, then put Xu Yang into the space, locked the door, and flashed into the space, and then returned home through the Seven Star Teleportation Array.
However, just as he appeared in his yard, he heard Funiu crying from inside the house.
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