In addition to the black technology crossbow, Lu Yu also designed a new dagger.

Dagger is one of the longest cold weapons used by special forces, and it is also a weapon that Lu Yu is best at using!

When fighting in close combat and infiltrating, daggers are the easiest to quickly kill opponents.

Like the black technology crossbow, Lu Yu also redesigned the dagger, and there are two styles.

The first type is relatively small in shape and is suitable for use as a finger knife.

Because of its small size, a belt can be specially designed for large-scale carrying.

Similarly, it is also suitable for use when flying to take the enemy's head thousands of miles away.

The belt will also be equipped with an electromagnetic recovery device, so as to pull out the flying knife and electromagnetically lock it, you can hit the target 100%.

Of course, because of the summoning device, the flying knife will be recycled and recycled.

The second type of dagger is no different from the size of an ordinary dagger.

However, Lu Yu installed a laser device, and there would be a special button on the handle.

Just press the button and a laser will be shot out from the front of the blade.

This laser can easily cut steel plates up to 50 centimeters thick, which is invincible.

Even when facing heavy armored tanks, they will be as easy and casual as cutting tofu.

However, the only difficult thing is that the requirements for laser devices will be very high.

With the current technological power, Lu Yu can only redesign and create a set of laser devices.

In addition to these two, there is also a new high-explosion explosive.

This explosive is rearranged on the original basis to achieve high energy concentration and saturation.

Just the size of a pigeon egg is needed, and the energy it releases is equivalent to hundreds of grenades exploding at the same time.

Small size, but very powerful and easy to carry.

Looking at the design drawings of the weapons in front of him, Lu Yu carefully modified them one by one.

It was not until the early morning that he put down all the drawings and breathed a sigh of relief.

Now, all the design drawings have been completed, just wait for the next step to be put into production.

Dongdong!

Suddenly there was a knock on the door outside.

Lu Yu walked over and opened the door, and found that it was An Ran: "It's so late, why haven't you returned yet?"

Look at the time, it is already half past two o'clock in the evening.

An Ran showed a soft smile, but couldn't hide the fatigue in her expression: "Are you waiting for you to go back together? I've been outside for more than three hours, and I've only come and called you after seeing you busy until now. You haven't noticed it yourself, have you not been home for a long time?"

Looking at the smile on An Ran's face, Lu Yu felt a lot of emotion in his heart and hugged her.

"Okay, let's go home together!"

...

This time when he went home, Lu Yu stayed with An Ranzu for a day and two nights without leaving the house.

As for what the two of them were doing during this period, only they themselves knew.

On the morning of the third day, Lu Yu held An Ran's hand and returned to the Military Factory Research Institute with a red face.

"I will create new weapons in the past two days, but I can't go back."

Lu Yu stretched out a hand and gently stroked Anran's face and stared at her: "After you finish your work, go back early to rest yourself. There is no need to wait for me, do you know?"

"Um!"

An Ran nodded gently: "If you work with peace of mind, I will definitely not bother you! I will be with you in two days when it's my turn to be on duty and I will accompany you tonight."

Lu Yu smiled and patted the latter's little head before turning around and walking into the laboratory.

Time was already very tight, and Lu Yu spent a day and two nights to accompany An Ran, but he felt that he owed too much to the latter.

So, give some compensation within your ability.

If he explains the matter well, he can devote himself to weapon research.

When he entered the laboratory, Lu Yu spread out all the design drawings one by one.

Although the weapons designed on each drawing are different, there are many similarities.

For example, most of the manufacturing materials of these weapons are the same, taken from a high-strength titanium alloy.

This composite material is extremely stable and is not prone to deformation in various environments. It is specially used for protective coatings for helicopters.

Moreover, it has very strong high temperature resistance and low temperature characteristics, and its toughness is even greater than that of the world's hardest steel.

Lu Yu first synthesized a large amount of titanium alloy materials to prepare for the basics of manufacturing weapons.

Next, we began to build the first black technology crossbow.

The first step is to customize a one-to-one crossbow model. Only by creating the real thing can you find out the problem.

Although the drawings were drawn, they were just floor plans.

Whether the size is suitable or not, how you feel about using it depends on the actual product.

At the beginning, Lu Yu had to build a mold and set all the details.

It took a whole day to basically complete the mold.

This was done only with his practice and with the help of a machine.

After the mold cools down, Lu Yu puts it under a high-power microscope and polishes it carefully.

Although it is a crossbow, it is not an ordinary crossbow, and it is a combination of cold weapons and modern technology.

This is a brand new and bold attempt. Whether it can succeed depends on how much effort Lu Yu spent on it.

Any small defect may lead to the scrapping of the weapon and ultimately affect the use.

Lu Yu was very careful every step, as if he was carefully polishing a work of art.

Even if the design of a place is flawed or inaccurate, errors will occur and even casualties will occur.

Therefore, we must wholeheartedly and not be careless at all.

Dongdong!

I don’t know that it’s been too long, but there’s a knock on the door outside the laboratory.

The door was pushed open, and Ye Ziqing walked in with a tray.

"It's so late, are you still busy?"

The latter placed the tray in front of Lu Yu, with some fruits and milk on it, and a bowl of fragrant noodles.

"Here, I'll reward you with such hard work!"

Lu Yu smiled and said, "I can't tell, are you here to bring me warmth?"

Ye Ziqing curled her lips: "Don't make bad ideas! This is what Sister An Ran told her. She just got back from get off work, and I happened to be on duty today!"

"Okay, thank my wife for me." Lu Yu smiled: "It's still my wife who loves people!"

The two of them talked a little, and Ye Ziqing continued to go out to work.

Lu Yu had enough food and drink, but he became more energetic and started working all night.

The model has been made, and it will be much easier to create a crossbow.

It's late at night.

In the laboratory, there was a buzzing noise about various machine tools working.

It continued until the next day at dawn, and the roaring sound of the machine gradually stopped.

Lu Yu also successfully added a crossbow prototype in his hand.

Of course, this is just a prototype, which looks dark and has not been carefully processed.

Next, just polish it carefully and install the electromagnetic device and thermal induction device, and the crossbow will have extremely strong lethality.

Crunch!

Just so happened that Ye Ziqing walked in with breakfast, and looked surprised when she saw the crossbow.
Chapter completed!