"Rachel, come over here. Diana beckoned to the fish-man girl who had just finished shooting in the distance.

"Teacher Diana, what's the matter?" Rachel hurried over after seeing Diana's call.

"Did you do what I asked you to do yesterday?" asked Diana.

"I've seen it. Rachel nodded hurriedly, "The barrel of the assault rifle that Mr. Charles left me is as smooth as the inside of a hollowed sea cucumber. ”

Diana nodded, then waved at Rachel to continue training, while she sat down in deep thought.

"It's still a smoothbore. Diana thought, "It is not difficult to draw rifling with rifled guns, and the American colonists of the seventeenth century could make a wooden broaching machine and use a hook knife to make rifling." The Minne bullet is even simpler, that's just a matter of thinking. ”

"Firing device ......"

The thought of the way Charles had fired the assault rifle made Diana look black.

Instead of firing a burst of projectile like arquebuses, flintlock pistols, and later shot-fired guns, Charles uses a small magic circle at the end of the barrel that pulls the trigger to open the magic path and explodes several small pillars of fire, which in turn ignite the propellant.

Thinking of this, Diana's brain opened up and began to conceive of advanced firearms that could be mass-produced based on the current technical conditions.

She felt that Charles's thinking was not magical enough, and he was still stuck in pure mechanical design, but she didn't know that with the help of magic, many mechanical designs could be replaced or simplified.

Starting with the simplest, the Green Cannon, which could be imitated in the last years of the Qing Dynasty, that is, the hand-cranked Gatling, appeared in her mind.

This kind of repeating pistol invented in the Xianfeng period has a simple and reliable structure, great power, and extremely high potential, which is very suitable for production in this world at present.

In the past, Charles once complained that a major obstacle to the development of firearms and bullets in the world is that it is difficult to have a large number of bullet shells around him, and there is no mechanized production, and the output of bullet shells is a shackle to a large number of firearms equipment.

"Then let's try the caseless bomb. Diana thought.

If Charles was here, he would definitely have a black line, because there are many disadvantages of caseless bullets, such as bullets without cartridge case protection are easy to get damp and damaged, without cartridge case, the chamber will be fully subjected to the chamber pressure and high temperature when the propellant is burned, which will cause the chamber to corrode and the high temperature of the chamber will cause the ammunition to spontaneously combust, and the propellant will have too much residue, etc.

Diana pondered these questions, and then realized that apart from the question of bullet protection, she thought that the other problems could be solved by means of magic.

Rifle corrosion can be solved with replaceable parts.

The high temperature of the chamber and barrel and the propellant residue are the problem, whether to try using a wind magic array, which is activated after firing the ammunition, and the cooling is carried out at the same time as blowing away the debris.

Although this can lead to a bit of trouble in the manufacture of firearms, it is a lot of money compared to eliminating the need to make bullet cases.

If this idea works, then other firearms can use this technology as well.

Immediately after that, she began to think about how to use this technical idea to improve the AK47.

In this unscientific world, materials science is the most magical existence.

After the material you want to figure out, with the blessing of magic elements or divine power, its physical meaning will also undergo some changes.

In this way, the development of alloys is limited.

Diana wasn't very worried about machining, she heard Charles say that the Rurik Kingdom had come up with a series of machine tools, as long as these machines were qualified, the accuracy of machining was always higher than that of manual machining.

......

I don't know how long it took, but Diana suddenly noticed that someone was watching her.

"What do you want?" Melidi sat next to Diana, "Miss your buddy?"

"It's not. Diana shook her head.

Then she said, "You said to fry your tail until golden brown on both sides, then add tofu cubes and ginger to stew together, and add some chopped green onions, sesame oil and salt when it comes out of the pot, what do you think will taste like?"

"That's how you want to make me into soup. Melidi glanced at her best friend, "Why don't I give you a few mouthfuls of water to wash your tail first?"

At this time, Diana suddenly remembered something, "By the way, I heard that someone paid a high price for your bathwater." ”

Meliti shook her body, "What about the Hanqi man, who is it, I cut him when I go back." ”

Before Diana could answer, she and Melida suddenly exchanged glances, and then disappeared into the dream platform.

Diana woke up from the passenger ship's room to find the deck chaotic and noisy.

Melidia, who was sleeping next to Diana, also got up, listened intently, and said, "Someone is coming to smash the field." ”

"Let's go!" Diana said, putting on her coat, "and we're going to help." ”

The two of them soon reached the deck, and found that the sailors and escorts were already in place.

The sailors began to steer the ships to the west coast to prepare for the rush, and the magicians of the escort activated the ship's defensive magic array to resist the attack on the sea, and the others launched counterattacks through various methods.

Diana noticed that Artoria, who was escorting her, was already standing by the side of the boat, carefully observing the sea at night.

When Artoria saw Diana and the others coming, she said to them, "The fishmen in the sea are attacking the bottom of the ship, and you must be careful that the ship will sink." ”

Meliti said indifferently: "I ran for my life in the sea, and no one could stop me." ”

Diana said succinctly: "I can fly." ”

"Okay. Artoria nodded, neither of these children was a fuel-efficient lamp.

At this moment, a team of fish-man mages unleashed their magic on the ship in the sea not far in front of them.

"I'll attack first, you follow!" Diana said to Melidie.

Then Diana raised her hands in the air, and a gaseous sphere of colorful light formed above her.

After preparing the "Vitality Bomb" composed of demon-breaking divine power, Diana threw it violently towards the group of fish-man demons.

"My god ocean, please give the punishment of the tsunami of villains ahead!"

Holding a wand as tall as herself, Meliti chanted a prayer to the god of the sea, and then unleashed her magic spell to attack the group of fishmen.

Diana's demon-breaking divine power "Vitality Bomb" smashed into the body of the team of fish-man mages, and at that moment, all the magic shields on the fish-man mages were broken.

In the next moment, the "Tsunami Technique" released by Melti followed.

Although he is also a fishman who believes in the god of the sea, under the attack of the high-speed current-like magic, the team of fishman mages was killed and injured by the magic.

Several fish-man warriors emerged from the water next to the boat and appeared in front of Diana and the others.

Artoria swung her sword and cut the two fishmen closest to her in half.

Diana raised her hand and waved, a green light shot out from her hand, and the fish-man who was less than two centimeters away from her nose with a harpoon in her hand was shot by the green light, and immediately lost her life and fell back into the sea.

At this time, Meliti, who was listening intently, said viciously: "[Fish-man foul-mouthed], they are here to get me. ”

"Don't worry. Artoria said to her, "They won't succeed. ”

"Hiss......" Diana gasped, "It seems that this time we have to use real skills, otherwise it will be over." ”

Hearing Diana say this, Melidi subconsciously felt a thrill, and couldn't help but recall how she and Diana knew each other back then.

It was a summer evening, and Diana, who had snuck to the beach, tried to use her old magic and blew up Melidi swimming in the sea to the beach.