As soon as Qiangzi entered the door, he saw Xia Yu studying the crossbow tongue there, he had already understood this thing, so he immediately replied.

Seeing that Xia Yu was still frowning, he added: "The Wild Duck Beast is a 2-star beast, but it is close to the level of a 3-star fierce beast, which is quite common, but in recent years, making crossbow tongues has been culled a lot. ”

Xia Yu suddenly realized when he heard this, and almost forgot that the materials in this world are not only those on the earth, especially all kinds of terrifying beasts, all of which are full of treasures.

"Why are you here again?"

Qiangzi pouted: "It's too boring! It's not safe outside, and there's nothing to do at home." Are you going to make your own crossbow?"

"It's not a crossbow, it's a pistol. ”

“...... Hand...... How do you shoot a gun?"

Hit your sister's pistol!

Xia Yu knew that he was wrong, and he had nothing to explain to the cow Qiangzi, so he said directly: "You go into the house to play swordfish and kill, and call you when I finish it." ”

Not to mention, Swordfish Kill is not an ordinary 2-star mechanism, Hadron can't afford it at all, he hasn't actually practiced perception much, and he has been playing for a while these days, and his progress is also rapid.

Qiangzi shook his head: "I'm just watching here, you kid is so mysterious, there must be a ghost, I want to watch it!"

Well, Xia Yu didn't bother to pay attention to him, so he directly put down the crossbow tongue and sat down on the operating table.

I have to say that this office room run by Lao Chen has brought surprises to Xia Yu more than once.

In the organ room, the tools are very complete, such as simple saws, hammers, rulers, cones, etc., and various forging, cutting, welding, grinding platforms and tools are also readily available.

Xia Yu even saw a small iron furnace and bellows in the corner, which can be simple solute steel, because it can be driven by source energy, the iron furnace can even reach a high temperature of 2000 degrees, and the efficiency is quite good.

Every time he was in this machine room full of tools, machine parts and materials, the faint smell of machine oil filled the air everywhere, which made Xia Yu feel like he was back in the earth laboratory.

As for what kind of gun to make......

Although he was not a military fan before the crossing, he was a mechanical major and knew some classic gun structures, and after careful consideration, he dedicated his first weapon to this world, a famous pistol in military history: the Mauser automatic pistol.

Who let me watch "Railway Guerrillas" when I was a child, and I was fascinated by the big mirror box for a long time.

Xia Yu took a deep breath, first groping through those bits and pieces of materials and broken mechanisms, picking and picking along the way, and finding some iron pieces, springs, small iron ingots, etc. to spare faster.

Then, he took a deep breath, picked up a steel pipe that had been dismantled from an unknown machine, cut off a barrel of more than 10 centimeters, and polished it for a while to keep it next to it for later use; then, after examining the existing springs, he picked out a large one as a circlip and a small one as a firing pin spring; for another half an hour, he used a grinding machine to grind out a set of usable iron blocking seats, iron blocking rods, and iron blocking circlips; then the trigger lock, trigger shrapnel, and magazine......

More than three hours have passed in the blink of an eye.

Hadron had already seen it boring, so he went into the house to play with swordfish and kill it.

During this time, no one bothered, and Xia Yu also threw away all distractions, as if he was really doing assembly experiments in the laboratory alone.

In this way, when the final polishing of the 20 empty shell bullets was completed, the work finally came to an end.

"My own craft, I still can't do it......"

He sighed to himself.

In fact, even for mechanical engineering students, most courses do not actually require such manual grinding of parts.

In comparison, those mature old craftsmen may even be more skilled than a university professor. After all, most of their later studies are mechanical dynamics, mechanical engineering, structural design, programming automation, etc.

Fortunately, Xia Yu is interested in handicraft, and he was still the core backbone of a craftsman club when he was an undergraduate.

In any case, after so much time of pure hand-building, he has "copied" more than 20 parts of the Mauser automatic pistol according to his own design ideas, with only a few minor changes.

The main changes are to add the crossbow tongue and add a recoil.

After all, this gun does not use gunpowder, it uses source energy.

Without the recoil generated when the gunpowder explodes, the gun body cannot be shaken backwards, and then the main spring of the locking tenon is pulled to complete the burst function.

Therefore, he skillfully polished the "crossbow tongue" made of the shoulder blade of the wild duck beast to a smaller one, blessed it at the rear end of the locking tenon, and connected it with a small connecting rod, so that the "crossbow tongue" can produce a corresponding recoil force after receiving the impact of the source energy explosion in the source box, and drive this mechanical structure to complete a series of "landing locking bolts" - and thus achieve continuous fire.

Moreover, the "crossbow tongue" did play a key role here, and he changed the name to "gun tongue".

The next step is assembly, which is very familiar to Xia Yu. Less than five minutes later, Xia Yu packed up his things and called it a day.

A "brand-new" Mauser is born!

Yes, although it is still a little ugly, there are several parts that are not tightly coupled and need to be polished again, and the handguard at the grip is still very rough, but this once famous weapon of the Earth civilization has ushered in the "premiere" in another world!

————

"Stone, this is the 'pistol' you design......ed?

After Qiangzi was shouted out by Xia Yu, he looked at this iron box that was obviously at the same level as a child's toy, and was a little disapproving.

But he also admits that the agency is at least on the outside.

Well, Xia Yu also admitted that his hands-on ability, which was quite good in college before, is not uncommon in this institutional world.

He believes that even if energy is not counted, the world's mechanical engineering experts are no worse than those Swiss craftsmen who have made watches, pistols and other craftsmen for generations on the planet.

"Don't talk nonsense, just try it!"

Because there was no explosive power of gunpowder, it was not so troublesome for them to test the gun, so they went directly to the corner of the organ room and found a rag buckled on a thick steel plate, and then stood more than ten meters away and fired.

Xia Yu handed the gun to Qiangzi: "Qiangzi, you can try it!" That's it, the muzzle of this barrel is aimed at the target, and after sensing and urging the source box, he pulls the trigger by the way, which is similar to the source shooting crossbow!"

"Well, this one is simple, and it's very convenient with one hand......"

Hadron took the gun, observed it decently, tried to pull his hand on the trigger, straightened his arm and raised the gun, slightly urging the sense, and muttering "It seems scary, I don't know...... Ahh

I only heard a loud "bang", and there were violent echoes everywhere in the organ room, which scared the hadson!

Xia Yu rushed to the front and shouted to him: "Stop, don't move anymore, I'll see the effect......"

Hadron also ran over, grabbed in front of Xia Yu and lifted the rag, a metal warhead had completely dried up, but the entire bullet body rushed into the steel plate more than 1 cm under the violent impact!

"It's scary, this thing is so powerful that it can catch up with the source-shooting crossbow!"

Xia Yu frowned slightly, knowing that the hollow bullet was a little too soft, the energy of the 2-star source crystal was very abundant, and the source array structure in the source box itself was for the source shot crossbow equipment, so the power should at least reach the standard of the iron arrows of the general source shot crossbow.

This can be improved, and another one has to be tried again, he dodged to the side, and shouted to Hadron again: "Hadron, this time you can activate three times in a row, remember to cooperate with the trigger every time!"

"What, you said this thing can shoot continuously? Isn't that a repeating crossbow...... Good guys, I've got to try!"

Now the hadron's expression is a little solemn, even shooting crossbows is not uncommon, but it is not something that can be bought at an ordinary price, it is monopolized by the official. He took a deep breath, closed his eyes slightly, and suddenly opened them, mobilizing his strongest perception and urging three times in an instant!

"Boom!"

"Boom!"

"Boom!"

A violent roar sounded in the organ room, and the hadron was completely stunned!

He looked at the "gun" in his hand in a daze, and then said with ecstasy on his face: "This gun can really be fired continuously...... Stone, you are too good! In the future, when I join the monks' regiment, everyone will use this pistol, and they will definitely be able to kill all directions!"