In the workshop, several technicians and Pu Su were gathering together to discuss enthusiastically.

The biggest trouble in equipment manufacturing is the unification of standards. Of course, this can be easily achieved with complete industrial automation, but it can only be regarded as semi-manual at best, and even the manual part accounts for a large proportion.

Later, Pu Su disassembled the "Bulgarian umbrella" and reassembled it smoothly.

The stainless steel hollow umbrella bone is completely hand-drilled by the technician with the machine, while the machine expansion and circlip embedded in it are completely handmade.

Especially for those delicate parts, the technician is wearing a nose magnifying glass.

The most difficult part is fixing the needle. In the end, the diameter of the needle they chose was only 1 millimeter, and if they used a thicker needle, such as a 14-gauge needle, the other party would feel obvious pain when piercing.

The Duke said that the two technicians had even tested themselves to discuss which needle was more suitable......

The need to fix such a slender needle is by no means as simple as it seems. The core of this umbrella is designed to make the last piercing, and if the needle is not securely fixed, all the previous work will be in vain.

So in fact, the main part of the umbrella has already been completed, and it is only the problem of overcoming the needle fixation that it has been delayed to this day.

Pu Su tried it several times on the spot, and after the needle popped out, it pierced into the wooden table leg, and the obvious piercing and pulling sensation could be felt in his hand. He had already thought of the most suitable experimental subject, Chu Mingyi, who was locked up in the mansion.

Now that he came, Pu Su simply stepped up his efforts to propose firearm modification.

The idea of the senior's pistol being changed to an automatic submachine gun seemed good to him, but he didn't need it much there. If a pistol doesn't solve the problem, then simply use a submachine gun to solve it.

The senior is in need because of his identity. As the chief inspector, you can't always go in and out with a submachine gun on your back all day. In the case of the need for the "Sophia Squad" to play, there are basically no scruples in this regard.

Just two sniper rifles are enough for the tactical requirements of long-range shooting and fire suppression.

So now these technicians are gathered around to discuss the modification of the sniper rifle proposed by Pu Su. The modification of the sniper rifle seems simple, it seems that it is simply to increase the range and caliber, add an optical sight, and store and dismantle.

In fact, the mechanical principles involved in it are very complex. The chamber of the gun should be wide, the barrel should be slender, the front sight should be installed behind the rear, and more importantly, the sealing of the gun body must be good.

So it's better to find a few more Mosin Nagant rifles and choose the two with the best accuracy and tightness to send over. Then it was remodeled, including the rifling part. And there is no way to aim at optics here, so you can only find a way to get a ready-made one.

Pusu's requirement is to be at least a kilometer away, and the kinetic energy of the bullet is enough to accurately kill the target.

Not counting himself, Alyosha had several good shooters on his side. Originally, he was the son of Orion in Siberia, and he has always been the best sniper in the Tsarist army.

He understands the horrors of snipers in actual combat, so he pays special attention to the modification of sniper rifles.

Whether it is a city street battle or a wilderness, if a sniper occupies a favorable terrain in advance, as long as the comrades provide sufficient cover, without heavy artillery to cover the bombardment, theoretically two or three snipers with sufficient ammunition are enough to suppress the opponent until the group is annihilated.

He reported to his superiors the idea of launching a special operation, and his superiors also gave him full leeway. The only requirement is for him to do it under the premise of protecting himself.

With such an operational design, long-range sniping can be used to the greatest effect.

With the target being defended, melee combat can't penetrate it, and the risk of evacuating after a successful attack is quite high. At this time, long-range attacks are the safest way to assassinate.

With a range of about a thousand meters, in the crowded city of Shanghai, it is usually already two or three intersections. The gunman had enough time to calmly evacuate the scene after firing from a concealed vantage point.

At the same time, this method of assassination is impossible to prevent. When to act, and who to choose? The other party has no way to grasp it, let alone prevent it. Caught off guard, he was killed by a single shot, and no one could even find out where the shot was.

Killing the target is only one aspect, and on the other hand, he wants to create this atmosphere. Let those invaders and traitors everyone be in danger and frightened.

Unless every person with a sensitive head travels along the road, especially high-rise buildings. Let's not talk about whether it is feasible to do so because it costs a lot of manpower. Even if they do, it will inevitably provoke public resentment, and they will never be able to afford it in the long run.

Pu Su knew that his ability was limited, not to mention that he was alone, even a hundred or a thousand could not control the situation of the battle. It's just that he also knows where his strengths are, and he knows what to do to make the other party feel uncomfortable.

The fundamental purpose is to constantly consume each other. We should make full use of the enemy's superiority in the open and the dark and use urban guerrilla tactics to carry out small-scale special operations.

He wants to build every member of the "Sophia Stormtroopers" into real elite soldiers, the kind of one to ten. Then, in a way that the old and the new are brought in, continue to train other personnel and form new squads.

At present, the "Sophia Stormtroopers" are composed of 10 people. His plan was for three teammates to form an action team, a team of three teams, plus a team leader.

In the case of limited personnel, the three-three system is the most reasonable establishment. The three teammates in the group are in a horn-type group formation, cooperating with each other to cover. The entire squad also acts in a triangular formation, with the pointed heads being scouts and the last two groups being cover.

So he also asked the duke to make some paper tube smoke bombs. The smoke grenades were so simple that the Duke didn't even want to do them. Three parts saltpeter and two parts sugar, as long as you know the ratio and raw materials, children can make it.

Tomorrow there will be two more technicians to come to his side, and maybe stay with him for a few days. He needs to set up a mechanism on the wall, and the place where the report will be sent in the future will also be made a hidden dark room to hide the radio station.

With the support of these highly skilled Russian craftsmen, he really feels very lucky.

There are few skilled craftsmen like them in the entire border region, and the country has always been an agrarian society before, and the ability of the scholars to do so is extremely poor.

Moreover, materials are extremely scarce, and only some land mines and earthen cannons can be produced in the arsenal in the border area. Damaged guns are often difficult to repair because of lack of spare parts.

It's not early, and he feels very happy here. Pu Su really didn't want to leave, and he was really reluctant to go.

He was a man who loved mechanics and engineering, and if it weren't for the ill-fated fate of the country and the ravages of the nation, he would have been a brilliant mechanical engineering designer.

Pu Su would love to stay here and spend a little more time with these respectable people, but this was the senior's last night in Shanghai. After saying that he would come back tomorrow morning, he reluctantly left.

When he left, he took all the finished products with him, including the "Bulgarian umbrella". The duke has already agreed, and will soon start working on the second one.