"It's finally done." After drawing the drawings of the last part, Jiang Yan stretched.

Seeing the large pile of drawings on his desk, Jiang Yan nodded with satisfaction, at first Jiang Yan felt that he had drawings of AK-47 and SKS semi-automatic rifles, plus some of the drawings of the "Bayi" rifle would be quite simple to copy by himself, and when he really started to develop it, he found that it was really not an easy thing.

An excellent firearm design needs to consider the following aspects:

Shooting accuracy: Shooting accuracy is an important indicator of the performance of a firearm. A good gun design can lower the dispersion circle, improve ballistic stability, and allow the shooter to hit the target more easily.

Reliability: The reliability of firearms is directly related to the safety of the user's life. Good firearm design should ensure that firearms can work properly in all kinds of harsh environments and reduce the failure rate.

Safety: Safety is the first principle of firearm design. The design needs to consider various possible misoperation situations, and set up safety devices to avoid accidental injuries.

Comfort: Comfort is an important factor that affects the user experience. A good firearm design needs to consider the comfort of the shooter during use, including the grip, trigger, recoil, etc., to improve the stability and accuracy of shooting.

Ease of use: Ease of use is an important indicator of how good a firearm design is. A good firearm design should be easy for users to operate, maintain, and clean to reduce ease of use and maintenance costs.

Adaptability: Firearms should be designed to take into account the needs of different users and have a certain degree of adaptability. Through adjustable design, modular structure, etc., the firearm can adapt to different usage scenarios and user needs.

A full-fledged firearm not only includes all of the above, but also a variety of necessary tactical accessories, such as additional grips, sights, etc.

The most basic thing to design a gun is to meet the conditions of the user. In fact, it is very simple, that is, "it is comfortable to hold, easy to fight, safe on the battlefield, and convenient for maintenance".

Although he said that he had a series of drawings and materials as a reference, he also had to solve some problems such as the structure of the firearm, the fire control system, and the aiming device, and he also knew a little about some things.

Fortunately, there are many engineers who specialize in designing firearms in the 663 factory where he is located, and Jiang Yan often asks them about these things, and even the factory library is where Jiang Yan often goes.

I didn't expect that it would take me three months to do this, but fortunately, I finally copied this firearm.

Jiang Yan copied the shape of this "Bayi" automatic rifle using the shape of the CS/LR14 automatic rifle that was later called the "ultimate magic modification of the Bayi style" by military fans, this shape is completely different from the shape of SL's AK-47, closer to the shape of Western firearms, and people in other countries later called the "Bayi style" the national version of AK-47.

The magazine has been modified, the guide rail has been added, and the butt has also become a foldable butt, the 81 type designed by Jiang Yan is the same as the original 81 type, using a short-stroke piston gas conduction system, retaining the empty compartment hang-up mechanism, the advantages are almost a lot, and the original shortcomings Jiang Yan also tried to correct as much as possible.

Considering that China will use 5.8mm caliber small-caliber automatic rifles in the future, the caliber of the Type 81 gun family is divided into 7.62mm and 5.8mm.

Jiang Yan's copy of the "Bayi" type assault rifle has a total gun length of 955 mm, a barrel length of 455 mm, an empty gun weighing 3.8 kg, and a place for adding a bayonet, and the 8 rifle is equipped with a safe, which can be single, triple or continuous, with a muzzle velocity of 720 meters per second, a theoretical rate of fire of 650 rounds per minute, and an effective firing range of 400 meters.

With the "Bayi-type" assault rifle, Jiang Yan also designed a matching squad machine gun, and the interchange of their two parts can reach 40 percent.

Therefore, the new "Bayi" copied by Jiang Yan is a grade better than the original.

Now that it has entered August, although the temperature in Bingcheng is lower than that in Sijiu City, the weather is still very hot at noon, and there is a feeling of breathlessness.

The old-fashioned electric fan above his head was squeaking and turning, Jiang Yan casually opened the drawer, took out a pack of cigarettes from it, took out one, lit Meimei and took a puff.

"Boss, eat watermelon, the watermelon in the sand is very sweet"

As soon as he took two puffs of a cigarette, Xu Damao pushed the door with a few watermelons and walked in.

Seeing the watermelon that Xu Damao brought over, Jiang Yan's eyes lit up, snuffed out the cigarette in his hand that he hadn't smoked a few puffs, took the watermelon that Xu Damao took and took a bite, this watermelon is really sweet to be honest, and the watermelon he took seems to have been chilled.

In this era, there is no so-called freedom to eat melons, the domestic watermelon varieties are limited, and the planting area is not much, which is a rare thing, if I am not mistaken, Academician Wu, the mother of watermelons, should have just entered the Western Regions to study melons and fruits, and it is estimated that it will take many years for the country to realize the freedom to eat melons.

"Where's the watermelon?" Jiang Yan took another big bite before he asked Xu Damao.

At this time, Xu Damao finished eating a piece of watermelon before he spoke: "I bought a batch of watermelons in the field, and every worker has a share. ”

"Is there one in Lao Guo?" Jiang Yan took a bite of watermelon and asked.

"Yes, of course."

Hearing that he had his share, Jiang Yan ate watermelon with confidence.

After eating the watermelon, Jiang Yan said to Xu Damao, who was cleaning up the watermelon skin: "After you finish cleaning up in a while, go and call Master Sun Deshui to the office, I have something to do with him." ”

"I understand the boss, I'm going to call him over." After packing up his things, Xu Damao walked out of his office with watermelon rinds.

After about ten minutes, Xu Damao came to Jiang Yan's office with Sun Deshui sweating profusely.

"Boss, I brought Master Sun here."

Hearing Xu Damao's words, Jiang Yan, who was sorting out the information, looked up and hurriedly greeted Sun Deshui when he saw him coming in.

"Master Sun is here, sit down, Da Mao will pour Master Sun a glass of water."

After the two of them sat down, Sun Shui said, "I don't know what Jiang Gong is looking for me." ”

Hearing Sun Deshui ask, Jiang Yan got up and took out a piece of drawings from a pile of drawings on the table, handed it to him and said; "I've invented a little thing, see if you can produce it, Master Sun."

Hearing Jiang Yan's words, Sun Deshui didn't speak, but took the drawings handed over by Jiang Yan and looked at them seriously.

He closed the drawing and said to Jiang Yan: "No problem, it can be produced." This stuff isn't hard. ”

(End of chapter)