It was not difficult to make a Maxim machine gun, this antique model was even sold on a certain treasure, and its unique toggle reentry mechanism was not structurally complicated.

Referring to the drawings, Chen Xin used the system to call up the materials from the storage room.

Although high-performance steel is required to manufacture machine guns, ordinary steel is enough for the system, and the rest of Chen Xin can be boldly handed over to the system.

With the help of the processing function of the workbench, the parts of Makqin were manufactured, and then these parts were assembled little by little, and soon a Makqin appeared on the Chen Xin workbench.

Although the assembly has not yet been completed, Chen Xin has only completed the barrel and bolt part, not even the most important bracket, the unpainted gun body is completely the original metal color, it looks white and miserable, but it does not hide the power exuded by this terrifying killing machine.

The Maxim heavy machine gun, the world's first truly successful automatic weapon powered by gunpowder and gas, became the most efficient killing machine in human history.

In the war that broke out between the Japanese and the Lucians, Nogi Noshinori, the god of war who was blown up to the sky by the Japanese people, led 60,000 people to attack the Lucian positions, adopted a very brainless pig advance tactic, and killed 5,000 people in three hours.

Although the Lucians were finally defeated, by the time they were finally captured, Nogi Noshinori had 60,000 soldiers under his command and had suffered more than 30,000 casualties.

In the First World War, Maxim won the title of widowmaker with his terrifying killing efficiency.

In the Battle of the Somme, a net of death fire consisting of hundreds of Maxims caused more than 60,000 casualties in a single day, and it can be said that an entire generation of people in Europe were killed in World War I.

This terrifying killing machine uses the recoil generated by bullets to achieve automatic fire, which is much more efficient than the Great Gatling Bodhisattva invented by the federal doctor to reduce the casualties of soldiers participating in the war, and is also more simple and convenient to use and maintain, so it quickly replaced Gatling.

However, because of its high rate of fire of 600 rounds per minute, Makqin generates a lot of heat when firing, or the barrel will turn red from firing in a few minutes.

Therefore, there will be a huge round sleeve on the barrel of Makqin, and when used, cooling water is injected into the sleeve to achieve the cooling of the barrel, as long as there is water in the sleeve, the temperature of the barrel will not exceed 100 degrees, and you can continue to shoot.

Some people may think that this weapon will have a huge advantage when used in cold weather, after all, if the environment is cold enough, the cooling effect must be good.

But in fact, it is Maxim that has a lot of inconvenience when it is used in cold areas.

Because Makqin uses a water injection pipe to add cooling water, dripping into ice in cold areas, the cooling water must be burned into ice and snow before it can be added to the barrel, and this often causes the cooling water to freeze, affecting the use.

Therefore, for use in cold areas, antifreeze must be added to the cooling water, and the antifreeze widely used at that time was alcohol.

This is why there is a joke about Lucia people drinking antifreeze, because the cooling water with alcohol as antifreeze was really a delicious drink for the Lucia soldiers who were called gray cattle at that time.

Later, in order to solve this problem, the Sovia people learned from the Finns to improve the water injection port on the sleeve of the gun and turned it into a large flap that could be filled directly with ice and snow, which effectively solved this problem.

Of course, for Chen Xin, he would not use such a troublesome way to cool down the barrel, after all, there was only one person, even if Qin Lan and Ding Ning came, there were only three of them, and it was best to install defensive weapons at the door, which was best designed to be fully automatic, and it was best to control it remotely in the shelter.

As for the problem of cooling, it may be a difficult problem to solve for people in Makqin's time, but for the modern military industry, replacing it with recyclable coolant and recycling can also solve this problem.

It's just that for the army, it has long been replaced with air-cooled machine guns, and there is no need to stumble on water-cooled machine guns.

For Chen Xin, he doesn't have to worry too much about the problem of coolant, as long as the rate of fire is kept low and it is not used for a long time, the Makqin made by modern technology actually does not have much demand for cooling and heat dissipation, after all, the manufacturing process and the materials used are completely different.

The last part was loaded into the gun body, and gun oil lubrication was added between the gun body parts, and a Maxim without a support frame was made.

Looking at this iron guy like a round roller, Chen Xin reached out and patted it, trying to hold it up with both hands.

Although it is a bit heavy, it is still within the range that Chen Xin can hold, but this is still a weapon that needs a support frame as a fixed weapon, and it is completely impossible to expect to pick it up and shoot like a light machine gun in film and television dramas.

Therefore, if Chen Xin wants to use this machine gun, he also needs to make a bracket for it.

However, when Chen Xin was preparing to make the scaffold, he suddenly remembered a picture he had seen, and after thinking about it for a while, he decided to make another one.

Because only steel was needed to make the Maxim, a second Maxim soon appeared on the workbench as well.

Looking at the two identical Makqin heavy machine guns on his workbench, Chen Xin nodded with satisfaction and began to make the support frame.

Compared to the Maxim machine gun itself, its bracket is actually more complex in structure, because in addition to being a support, the Maxim bracket has many different functions.

Some have added shields to resist the splashing of stray bullets and fragments; Some are equipped with seats that allow you to sit on a stand and shoot; Some simply have a spare barrel integrated into the bracket, which can be disassembled and replaced if necessary......

What Chen Xin did was to install two Maxims together in parallel brackets, turning the original one Maxim into a double assembly.

Because of the original bracket structure as a reference, it is not difficult to make a double-mounted bracket, and Chen Xin just took a little time to make a bracket that can install two Makqins.

Although the structure is somewhat irrational and a bit rudimentary, with little room and angle adjustment, it is still a complete bracket.

After installing the two Makqin and changing their names in the system interface from the Makqin water-cooled machine gun to the twin-mounted Makqin water-cooled machine gun, Chen Xin ordered the upgrade.

It was still the familiar green light, and the survival point of one hundred points and the consumption of some steel made the original rough and simple duplex Makqin instantly become different after the green light swept over.

The original white and miserable metal color has become black, part of the structure has been replaced by engineering plastics, the diameter of the thick water-cooled sleeve has been reduced, but the length has been lengthened, and the longer sleeve and longer barrel have improved the heat dissipation performance and enhanced the power of the bullet fired from the chamber.

The simple bracket has also been upgraded, from the original simple three support feet to a complete support structure, Chen Xin's original undone movable connection structure has also been added, after removing the fixation, the gun body can be rotated within a certain range to achieve multi-angle shooting.

The trigger part was also modified, from two triggers for two guns to one trigger for two guns, merging the structure and reducing the complexity of operation.

As for the upper port, it was also adjusted from the original orientation to the same side to one on each side, and according to Chen Xin's plan, a large-capacity magazine was added to the upper port.

This kind of large-capacity magazine still uses a bullet chain, or simply put, the magazine is just an ammunition box for loading bullets, but because of the system upgrade, there is an additional ammunition feeding mechanism on this magazine, as long as it is loaded on the machine gun, it can directly feed the bullet into the upper ammunition port.

After completing the production of the machine gun, as long as this twin Makqin was loaded at the gate of the shelter, Chen Xin believed that no one would be able to break in without heavy vehicles or heavy weapons.

However, one machine gun has a limitation on the firing angle, and after thinking about it, Chen Xin still decided that it would be more appropriate to install two.

So he made another Maxim machine gun with the same twin load, and then prepared to install them on the door of his shelter.

The two machine guns were installed on the left and right sides of the gate by Chen Xin, because the outside of the gate of the shelter showed an inverted terrain, although the snow was piled up around, the terrain was still flat, and if you wanted to enter Chen Xin's shelter, you had to stand in front of the gate, that is, within the range covered by the fire of the two twin Makqin.

In this range, if there is not enough protection, no matter how many people are killed, they will only be beaten into a sieve.

In addition, Chen Xin installed these two machine guns in the wall and only opened a small firing port, even if he wanted to destroy these two machine guns, in the absence of heavy firepower, if he wanted to destroy them, even if he used human lives, it would only be a futile effort to consume Chen Xin's bullets.

The large-capacity magazine has a bomb load of 200 rounds, and two twin packs are 800 rounds.

Even if it is a strafing shot, 200 rounds of ammunition for a single machine gun is enough to sweep for almost a minute, and if it is a short burst, if you want to consume these bullets, I am afraid that it will not take hundreds of lives to pile up.

In particular, after Chen Xin installed the machine gun, he smashed a thousand survival points and upgraded a lot of materials on the gate, strengthened the strength of the gate, changed the manual push-pull door opening to an electro-hydraulic lifting door opening, and also added automatic aiming function for the two machine guns, and installed an infrared night vision monitor and dynamic sensing on the gate.

The infrared night vision monitor and motion sensing are directly connected to the computer in Chen Xin's bedroom, and at the same time, they are also connected to two machine guns, and Chen Xin can operate them in the bedroom.

As long as a suspicious person appears and triggers the motion induction, Chen Xin will be woken up by the alarm bell in the bedroom, and he can see the situation outside the door through the computer screen.

If someone has a bad intention...... The four tongues of fire that cross and cover are a nightmare even on the battlefield.