Chapter 317： Upgrade, upgrade! Get powerful combat weapons!

The more Lin thought about it, the more he thought it was okay.

Even if the bazooka will not be able to be mass-produced for a while, he can still match the mp5 submachine gun to the robot dogs.

The power supply problem that plagues the robot dog is actually very easy to solve.

Produce more robot dogs that can be charged with solar panels, and then make them fully charged, even if the lizardmen come all night, don't be afraid at all!

Lin Yue quickly walked to the shelter, opened the alloy door, and brought his friends back to the safe and comfortable shelter.

Turning on the light, Lin Yue walked into the shelter bathed in warm light.

After the tension from the battle just now disappeared, a deep sense of exhaustion gradually came.

Still, he didn't want to fall asleep just like that.

The things to be done have not been completed, especially, this time he received a lot of saltpeter, which stimulated his nerves and curiosity, making him want to make black gunpowder, which can be said to be the most important thing today.

Think about it, what would happen if you combined black powder with something like a crossbow?

Exploding arrows!

A more terrifying and powerful weapon than a burning arrow!

If equipped on a ballista...

Even if a giant creature comes, it can be unimaginably severely injured by a simple attack of an explosive ballista arrow!

Until then, though, he needs a safe and sturdy environment.

In the event of an accidental explosion, he would not injure himself or the sanctuary.

Xiaobai and Xiaomeng led the little ice lizard to the bathroom, and washed the blood and sweat of the lizardmen on their bodies. Lin Yue also took off the light-extinguishing night suit and immediately ran to wash it.

I have to say, this taste is too unbearable.

After cleaning, he gave Xiaobai something to eat. Lin Yue also took a piece of lion-headed bear steak in his mouth, went down to the basement, and walked to one of the emergency passages.

Halfway through the passage, he pushed open a metal door that had not been opened for a long time and entered.

Turning on the lights, Lin Yue looked at the room made of alloys, took out a high-precision research workbench and placed it in front of him.

Alloy Refuge, currently, among all his Vaults, the only one that is the safest and most sturdy.

At least when hiding here, it is estimated that apart from thunderstorms, no other disaster can break through here and cause any impact on him.

It can be said that it is extremely sturdy, and it is the most suitable refuge for the last human beings in this other world.

Eighty square meters of space is also spacious enough.

Lin Yue opened the door halfway, and where he was standing now, in the event of an accident, he could rush out of the shelter's door as quickly as possible.

Take out 1 unit of natural sulfur ore and put it on the workbench, the workbench will break it down into sulfur ore and other things.

This is quite convenient.

Lin Yue took out a piece of paper, put the sulfur ore on it, and put other impurities in the storage space.

He spent 300 points in the Survival Point Mall to exchange for 3 units of charcoal, and put it on the piece of paper, and got the sulfur ore.

"I remember, it seems that the ratio is 2 units of saltpeter?" Lin Yue recalled the knowledge he had read on the Internet before, and after placing 2 units of saltpeter on top, suddenly the system made a sound.

You got the black powder blueprint! 】

Good guy, how did it go so well this time.

Lin Yue even touched the alloy door with his hand and stepped out halfway with his feet.

To be honest, in terms of explosions and gunpowder, he really only knows the so-called 1 sulfur, 2 nitrate, and 3 charcoal. The other ones died when he was a child. When he was a child, he went to the street to pick up the leftovers that were not successfully blown up in the wedding and gun battles, and then poured out the inside. Gunpowder is lit with a match at the end.

But being able to successfully get the black powder out is worth celebrating.

"Black gunpowder... How powerful is this thing?" Lin Yue immediately started to make it. After preparing the materials needed for the design drawing, a white light flashed, and five units of black gunpowder were produced, which also appeared in front of him successfully.

According to the requirements of the design drawing, there is also a piece of paper, and this paper is also the outer packaging of the black powder.

Lin Yue picked up one of the bags and immediately identified it.

Primary black powder: After being ignited, it can burn violently, and at the same time, the volume will expand rapidly, the pressure will increase sharply, and the large amount of heat released by the reaction will further sharply increase the temperature to more than 1000 degrees Celsius, causing the gas to expand and produce a strong explosion. The thrust caused an explosion. During an explosion, particles of solid product are dispersed in the gas, producing a large amount of smoke. 】

The power does not seem to be great.

After all, to be honest, this thing is more used for fireworks and firecrackers. If you want to increase its power, you have to add some additional materials.

The material must be harmful.

Just like...

Lin Yue took out a piece of steel and put it on a unit of black powder, but there was no response.

Once again, the experiment was placed on three units of black powder, and the system's judgment came.

To upgrade the black powder to steel ball explosive, you need a universal upgrade design x1]

really.

Although I don't know if there is such a so-called steel ball explosive in reality, since the system has determined that it can, then there is no problem.

I glanced at the remaining universal upgrade design drawings, and they are out of stock.

By the way, he listed twenty bottles of wine on the World Trade Channel and chose to receive a wave, the more the better.

You got Ball Dynamite! 】

The volume of the black powder in front of him slightly increased by about twice as much.

Lin Yue didn't stop.

You decomposed the steel ball explosive and obtained the design drawing of the steel ball explosive! 】

This time it works.

Steel ball explosive: black powder x3, steel x1]

Putting away the remaining black powder on the table, Lin Yue immediately chose to make it!

You got Ball Explosive x2]

There was exactly the same thing as before.

Steel ball explosive: After a sufficient amount of black powder explodes, the steel ball in the explosive will be ejected and cause great damage, with a killing radius of three meters! 】

Lin Yue couldn't help nodding slightly as he watched the exciting words identified by the system.

If this thing is shot with a ballista arrow, what effect will it have?

At least when facing the impact of a group of lizardmen legions, it is estimated that it will cause great damage and shock them!

In the case of not being able to obtain or manufacture tnt or c4, at present this thing should be the most powerful weapon he has in his possession.

Lin Yue's heart was full of excitement!

He took out the ballista and placed it in front of him, and then placed a steel ball explosive on top of the ballista arrow.

Upgrade ballista arrows to burst ballista arrows, you need a universal upgrade design x1]

Judgment is successful!

So…

You lost 3 bottles of wine, get the universal upgrade design x11! 】

After the mall evolved into a world trading mall, the speed of receiving quotations was much faster, and he immediately selected the current highest bid and successfully traded it.

The rest will take your time, not in a hurry.

Next…

upgrade!

You got the Burst Ballista Arrows! 】