With Lin Ziran's understanding of the science and technology of this world, many basic technologies are already available, otherwise it would be impossible to manufacture a steam engine.

Lin Ziran even knew that some designs of rear-loading rifles had appeared in this world, and even some armies had been equipped on a small scale, but at least so far, there was still no large-scale army on the entire Blue Star that was generally equipped with rear-loading rifles.

Because they have never been able to solve the problem of breath-holding.

Not to mention a breech-loading rifled rifle.

Even front-loading rifled rifles could not be mass-equipped.

The first to be equipped with rifled rifles on a large scale was Lin Ziran's supplementary brigade.

So far, Lin Ziran has not found that other feudal towns are equipped with similar mini rifles, but Lin Ziran knows that the performance advantage of the mini rifles of his troops cannot be maintained for long.

Just like the new nine-pound field gun they are equipped with, this brand-new, high-performance bronze smoothbore gun shines in this year's Luo'an Civil War, whether it is Luo Haijun or Feng Haozhong, Jian Minggang and other troops, they are already equipped with this new type of artillery.

As for the source, it is all the same Nanzhou Machinery Bureau.

As for why the arsenal officially owned by the county guard of Luohai County would provide guns and ammunition to other feudal towns, you have to ask the Nanzhou Bank.

At the beginning, Lin Ziran was able to purchase this new type of artillery, and there was no reason why Jian Minggang and Feng Haozhong couldn't purchase it, and even the price they purchased was cheaper than Lin Ziran.

It's been a year since the appearance of the Minnie rifle, and although Lin Ziran and they have always paid attention to secrecy, it is still difficult to keep it a secret for a long time.

In order to keep the secret of the Minnie rifle, Lin Ziran even deliberately retained the appearance of the Fuyuan musket, and outsiders could tell what was special about these Fuyuan muskets through their appearance.

Because the Mini rifle modified from the Fuyuan musket is actually almost no different from the original Fuyuan musket in appearance, the only difference is that there is more rifling, and the rifling thing has to look directly at the chamber of the gun.

And it's no secret just to know that the Fuyuan musket has rifling, and everyone has a front-loading rifled musket.

The biggest secret lies in the bullets.

It would be difficult to discover the mystery of the Mini rifle if you did not see the special structure of the Mini bullet and the cork at the bottom of the Mini bullet.

Mini bullets and front-loading rifled guns are combined, and this is complete.

But even if Lin Ziran tried his best to keep it secret, he also knew that it was impossible to keep it secret for long, and it was estimated that at this time, there were already feudal towns that began to imitate and equip Mini rifles.

After all, this thing is hardly difficult for the industrial base of contemporary Daheng, especially in terms of processing accuracy and barrel material.

The Mini rifle of the Aoyama Machinery Factory was directly modified from the Fuyuan musket, and the Aoyama Machinery Factory at that time was actually just a small workshop, relying only on a few high-precision processing equipment......

For the large arsenals of today, they can directly produce large quantities of Mini rifles without even having to move the production line on a large scale.

After all, the technical level of the contemporary Blue Star is already quite good, and even a 10,000-ton ironclad ship can be built, and it is said that it is a mere Mini rifle!

If it is only a professional arsenal or even an ordinary machinery factory, let alone other professional arsenals, let alone Mini bullets, a batch of bullet molds can be dissolved by soldiers.

As a result, it won't be long before other feudal towns were massively armed with Mini rifles.

If Lin Ziran still wants to keep his troops equipped with an advantage, the best choice is naturally to get the rear-loading rifle out.

This is also the reason why Lin Ziran brought Boss Wang and the technical backbone of the machinery factory over.

After Boss Wang briefly looked at Lin Ziran's design sketch, he quickly asked his doubts: "How to solve the problem of breathlessness?" ”

Lin Ziran once again took out a design drawing: "Use metal fixed bullets, directly wrap the propellant and single head and primer with metal, and the bullet case is made of brass, using the expansion characteristics of soft metals under high pressure to hold their breath." ”

Hearing this, Boss Wang did not speak immediately, but carefully looked at the design drawings of Lin Ziran's metal bullet suspiciously, and finally came out with two words: "It's that simple?" ”

Lin Ziran said: "It's as simple as that! ”

Lin Ziran continued to the design of the bullet: "Directly combine the fire cap, propellant and ammunition, and make the cartridge case from brass, and finally form such a brass fixed bullet, when firing, the firing pin hits the fire cap at the bottom of the bullet to ignite the propellant, and the propellant burns directly in the cartridge case, and the high pressure generated during combustion will compress the brass cartridge case and stick to the gun chamber!" ”

"Perfect solution to the air leak problem!"

Boss Wang looked at it carefully, and finally said, "Why didn't anyone think of it before?" ”

Lin Ziran said secretly, if I didn't come from the earth, and I often soaked in messy forums, I wouldn't have thought of it!

Boss Wang said at this time: "But if this metal bullet is to fit the gun chamber perfectly, the accuracy of the processing is very high, if you want to do it, we have to buy high-precision processing equipment, and the firing pin is also a problem, I am afraid it is not easy to mass production!" ”

Metal bullets may seem simple, but in fact, if you want to mass produce them and make sure that every musket can be used, you need to make sure that the machining accuracy is very high, not only to ensure that the caliber of the barrel is consistent, but also to ensure that the size of the bullet is the same.

In addition, the metal bullet designed by Lin Ziran, although the primer is placed directly at the bottom, which can effectively shorten the length of the firing pin, the requirements for the firing pin are still not low.

Don't look at the firing pin as just a gadget, but if you want to make such a small firing pin durable under repeated high-intensity impacts, instead of breaking after a few uses, the requirements for materials are still relatively high.

Then Lin Ziran gave him a detailed explanation of the design concept of the rear-loading rifle, but it was just a concept, as for how the bolt should be specifically designed, this was the work of those engineers, and at the same time, Lin Ziran also told Boss Wang that the detailed design should be based on the Fuyuan musket.

Lin Ziran didn't need them to design a new rear-loading rifle with superior performance now, and they couldn't produce it if they designed it.

Because the current processing capacity of Qingshan Machinery Factory is good, but the basic capacity is still very poor, so far they have not even been able to mass produce the barrel of the Fuyuan musket.

Don't look at the Fuyuan musket is just a smoothbore gun, but the quality of the barrel is quite good, and even the barrel made of stainless steel and the blue baking process almost represents the world's most advanced steel smelting level and finishing level.

Otherwise, Lin Ziran would not have directly converted it into a Minnie rifle, or even directly prepared to convert it into a rear-loading rifle.

The technical difficulty of modifying the Fuyuan musket and producing a rifle directly from scratch is exponentially more difficult.

Even if all goes well, it will take at least a year before the Aoyama Machinery Plant will be able to produce rifles in a preliminary and complete manner, and the output will not be too high.

The best solution is to use the existing Fuyuan musket and can be obtained in large quantities from the outside world to modify it at the beginning.

After a few days, Boss Wang took a group of engineers to study Lin Ziran's design drawings.

The specific process is that Boss Wang crosses Erlang's legs and drinks tea to assign tasks, and more than a dozen engineers bury their heads in research.

It only took three days for Boss Wang to find Lin Ziran with the perfect detailed design drawings!

There is nothing too special about this blueprint, it is just a modification on the basis of the Fuyuan musket, which is simply to dig a large hole in the tail to reload the bullets.

But as soon as Lin Ziran finished reading the design drawing, Boss Wang took out a design drawing and said: "Those people say that the caliber of 18 mm is still too big, and they say that the caliber is reduced, and the performance will be better if the caliber of 13 mm is maintained, the effective range is longer, more accurate, and it can also reduce the weight of the gun." ”

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