In the next few minutes, Murphy and Colin exchanged several types of ammunition, and in the end, only the top-notch, fourth-level enchanted ammunition made of the magic material "Soul Iron" could penetrate the fortress, and the other ammunition, including the third-level enchanted lead bullets, could not break through the concrete walls of the fortress that were half a meter thick.

However, magic materials are not cabbage on the side of the road, they are not so random to obtain, you have to have money.

This "soul iron" is a rare toy that Murphy spent nearly 1,000 gold naso on Carolon to buy five kilograms, and it is simply a luxury to make non-recyclable ammunition.

However, the advantage of this ammunition is that it is fast, accurate, and ruthless, and even the high-level transcendents of the fifth level can't react, and the speed is close to or even exceeds the automatic rifle bullet of picric acid propellant, and the power is equivalent to that of an anti-materiel sniper rifle!

It's hard to imagine how terrifying it would be to make a bullet with magic materials after Luo Chew Bas researched smokeless gunpowder in the future, and then used magic materials to make bullets after he and Carolon worked together to develop an air-conductive rifle!

Why do we have to study air-guided rifles? Couldn't we copy the improved method of the cannon and replace the firing method with an ultra-small repulsive propulsion circle?

In fact, Murphy had already asked Carolin this question.

However, the answer is, no!

The smaller the repulsion propulsion formation is made, the higher the requirements for magic control, even if it is a Carolon level 6 transcendent, and it is also the magic control ability of a pure magic creature, it can only shrink the repulsion force to five centimeters in diameter, which cannot be applied to the flintlock pistol, and this also requires a lot of magic power, for Carolen, it is completely a loss-making business, and it is absolutely impossible for him to agree to make it.

Murphy had no choice but to give up and turn his hopes in other directions, one of which was the air-guided rifle.

However, at this stage, the technical level is not up to standard, and it is not possible to make such a rifle for the time being, so Murphy combined the existing military technology level to design a new rifle - the needle rifle.

After using flint to make a flintlock pistol, the accuracy, firing speed and safety have improved to a very high level, but this rate of fire is far from enough for Murphy, and the thunder mercury is very unstable, if it is replaced with magic materials, the cost is too high, and if it is replaced with metal fixed ammunition, the reserves of metal, especially copper, are too low, and the production cost is no less than the use of magic materials.

So Murphy had an idea, thinking of the Mini projectile and the nineteenth-century Prussian army's Dreiser's needle pistol, so he began to design a rifle of a similar style, as well as a matching revolver machine gun, that is, the famous Gatling gun.

The production standards of the new Mini projectile are fully met, and the paper-shell type of fixed charge was replaced by Murphy with griffin bark, which has become tougher and less easy to wear.

The design of the breech charge was changed to a breech charge, which greatly improved the rate of fire and the convenience of operation.

The caliber of the ball lead bullet is actually larger than the caliber of the barrel, and the charge is forced into it by the soldier, so it is inevitable that there will be some accidents sometimes, which will cause inconvenience to the shooter's shooting, such as difficult reloading, insufficient accuracy, well, the flintlock pistol is not accurate enough.

But it is different after the Mini warhead is replaced, there is a conical hole at the bottom of the Mini projectile warhead, a wooden plug blocks the bottom of the hole, and the gas compresses the wooden plug into the cavity when firing, forcing the bottom of the bullet to expand, close to the rifling, close the gap between the bullet and the breech, so that the gas cannot leak out, and the warhead can rotate at high speed under rifling pressure.

In this way, the lethality is great, the loading is convenient, and the accuracy is also high, and it is a must with the Dereiser needle pistol.

And rear-charge firearms are also the only way for the future development of firearms!

Ever since he was a child, Murphy had a deep memory of the blue-fire Gatling in computer games, and he even designed an oversized revolver gun for use in helicopters after he got to work.

According to Murphy's design, the caliber of the barrel is about 12.7 mm, ten barrels are fixed on the runner, the ammunition uses Mini rounds, and a small magic array is used to drive the runner to rotate, and the theoretical rate of fire can reach more than 2,000 rounds per minute!

However, although the idea is good, these two weapons are still only existing in the design draft, because the arsenal is currently ramping up the production of mines and grenades, as well as ammunition and guns, there is no time and resources to invest in new designs, not to mention the fact that these two new things are still very difficult to produce.

It seems that the new invention can only be put into practical use after the rebellion is over. Murphy sighed lightly.

"Your Highness, Your Highness, what are you thinking?"

Knight Colin looked at Murphy suspiciously, just now His Royal Highness was inexplicably stunned for more than half an hour, his eyes were blank, and Colin was so anxious that Colin quickly woke him up.

Seeing that it was getting dark, Murphy returned to the carriage with Marshall and Carolin and drove back to the city.

"Colin, remember, there are three such forts to be built here, and I want you to get them in three or five days, do you hear that?" said Murphy as he pushed back the window and said to Colin as he was about to go to the makeshift camp to rest.

"Understood, mission guaranteed!" Colin turned around, gave a new military salute, and watched the carriage sail north.

"Sir, the first fort has been completely condensed, the formwork has been removed, look at it, what should we do next?" a man who looked like a foreman walked behind Colin and bowed his waist and asked.

"Yes, Your Highness is very satisfied, you tell the big guy not to rest in a hurry, let's set up the template of the second fortress and start dinner, there will be meat to eat tonight!"

Colin lowered his hand in mid-air, turned to the foreman, and walked to the first fortress to inspect.

The foreman received the order, and when he heard that there was meat to eat in the evening, he rushed back to the workers' pile and announced the good news to everyone.

As soon as those workers heard that they had meat to eat at night, they all burst out with great enthusiasm for their work, and they were busy in full swing.

Murphy and the three turned several corners, and when they returned to the city, it was completely dark, and the weather at night was still very good, the bright stars shone on the sky, and the stars seemed to be about to fall, and the stars held February, and now there were only two moons at this time, and when it was late at night, it was March.

Murphy dismounted, said goodbye to Marshall, and returned to the castle with Carolen, but Philip had been waiting at the gate for a long time.

"Huh, Philip, what are you looking for me?" Murphy frowned suspiciously, looking at the old slave Philip.

"Your Highness, a group of wise goblins have come to visit, and it seems that their status is not low, and they say that they want to find you and have something important to discuss. Philip bowed his brow and whispered.

"Oh, smart goblins, what are they going to do?" Murphy was also a little confused.

"The old slave doesn't know, they are silent, saying that they must see you, and they are now in the living room. ”

"Okay, I see, take me to them. ”