The new SY-67 assault rifle designed by Sun Guowei and Yao Hongjun is an assault rifle similar to the Mauser.

Mauser guns, bolts are safe, simple, robust and reliable, and most of the rotary pull-back bolts are designed according to the principles designed by the Mauser brothers. On the bolt there were three bosses, two in the head of the bolt and one in the tail of the bolt. The two protrusions in front are the locking protrusions, and some people mistake the tail protrusions for the third interlocking protrusions when they enter the barrel tail, but in fact it is only a safety protrusion and does not touch the latching shoulder on the receiver. The gun crew is very empty and easy to remove from the receiver, and there is a bolt tenon on the left side of the receiver that can be rotated and pulled out when opened.

Another well-known feature of the Mauser bolt is its case hook, which has a strong, heavy claw hook that grips the bottom edge of the case as soon as the cartridge leaves the magazine and holds the cartridge firmly until it is ejected. This technique, known as the "constrained feed", was an important invention of Paul Mauser in 1892, and because the shell hook did not rotate with the bolt, it avoided the failure of the upper double bullet.

The lever is securely mounted on the bolt body, referencing the design of the Enfil rifle and instead fixed to the rear of the bolt until the Type 98, when the bolt is latched, it extends horizontally to the right, with the exception of a few special models (carbines, snipers, and bicycle rifles) that are curved downward. On the standard rifle developed in 1924, the straight-pull handle was still used, and it was not until the Type 98K rifle that the pull handle was bent downward. The down-bending lever not only makes the rifle more convenient to carry and less likely to trip over debris, but also makes the bolt more comfortable to operate.

The bumper is located above the rear of the bolt and can be easily operated with the thumb of the right hand, and the bumper has three operating positions: when the bumper is toggled to the right. At the same time, the fire arrester and the bolt body are locked, at which point the rifle can neither shoot nor open the bolt, and when the bumper is turned to the center position (lifted upward), the arrestor is only locked, and the rifle cannot fire and block the aiming line. However, the bolt can be opened to reload or empty the magazine, and when the bumper is moved to the left position, the trigger rifle can be fired by simply pulling the trigger. The trigger is a two-way fire design, which is both safe and reliable.

Sun Guowei and Yao Hongjun, after designing this kind of firearm weapon, conducted a series of shooting experiments, and felt that this kind of gun was much stronger than traditional guns. So I want to try it with Zhao Zhongyao!

Before Zhao Zhongyao, he wanted to develop a new type of rifle, that is, the world's most famous gun weapon he knew before his death-AK-47 assault rifle!

But the structure of this gun is somewhat complicated. In a short period of time, he is afraid that he will not be able to design such a gun. If he wants to design such a gun, I'm afraid it will take a lot of time!

Originally, Zhao Zhongyao also thought that as long as he designed such a gun, he could defeat any kind of gun developed by Sun Guowei.

And during this period of time, he is also developing and designing such a gun of the god of guns.

Because, Zhao Zhongyao didn't really want to compete with Sun Guowei on the performance of guns and weapons. There is no plan to develop a gun weapon, and he has to compete with Sun Guowei.

So. The AK-47 firearms and weapons that Zhao Zhongyao is now designing have not been produced, but there is a preliminary drawing on his design drawings.

But one day, while he was still designing his AK-47 assault rifle, Sun Guowei and Yao Hongjun came to find him. Sun Guowei is still holding a new assault rifle in his hand!

Then. Zhao Zhongyao was taken aback, thinking what are these two people doing! Coming to him with a gun, do you want to duel with yourself.

"Hey, Master Sun, Master Yao, what are you doing in my office with a rifle!" Zhao Zhongyao looked at Sun Guowei with a smile on his face. Carrying a rifle and coming to his office, he felt a little nervous, and more inexplicable, I don't know what Sun Guowei wants to do with himself!

"Haha, Xiao Zhao! How about it, look at the gun that Lao Yao and I developed! Isn't it beautiful!" Sun Guowei said, and put the gun on the desk in front of Zhao Zhongyao.

Zhao Zhongyao picked up the gun and took a look, feeling that this gun was a little familiar, he thought for a while, and felt that this gun was similar to the Mauser gun, which was a more famous gun in the world in the early days of his life.

This kind of gun can be said to be famous in the world before Zhao Zhongyao's death. During the First World War, soldiers from all countries participating in the war basically used such guns.

The Mauser brothers, who invented this firearm, became military experts and big entrepreneurs. It can be said that he made a fortune because of this gun.

However, this manual rifle, after the First World War, lost its former charm. Because there is a new type of firearm weapon, which gradually takes its place.

This is the carbine invented by country M. This gun is a semi-automatic rifle. Compared to the Mauser, it can be said that it is much more advanced.

The Mauser brothers also gradually faded out of people's sight because of the advent of the card soldier gun. Their arms company also went out of business because of this.

As a famous scientist in the 21st century, Zhao Zhongyao still knows a little about these things.

How to say, when he was in that world, he still had some hobbies for military equipment, and in his spare time, most of them read some books and magazines on military equipment.

The story of this Mauser and carbine is also well understood. This style of gun was also seen in some military pictorials before Zhao Zhongyao's death.

When Zhao Zhongyao now saw Sun Guowei put a new assault rifle on the desk in front of him, he felt at a glance that this kind of gun should be regarded as a gun similar to the Mauser.

"Oh, is this the new weapon developed by Master Sun!" Zhao Zhongyao asked Sun Guowei with the new weapon developed by Sun Guowei and Yao Hongjun.

"Yes! This is the new assault rifle that Lao Yao and I have developed after a month of hard work! I don't know if Expert Zhao has developed any new weapons!" Sun Guowei looked at Zhao Zhongyao with a trace of disdain in his eyes.

"Xiao Zhao! This is the result of a month of hard work by me and Lao Sun! Look, isn't it very advanced! Can you develop a weapon that is carried out like this?" Yao Hongjun also looked at Zhao Zhongyao coaxingly, as if the two of them were military industry experts, and Zhao Zhongyao was just a nerd. (To be continued......)