In this era, ordinary firearm-type thermal weapons are simply impossible to use underwater and will simply misfire.

But the harpoon gun is different. It is said to be a gun, but in fact, this weapon does not use gunpowder at all.

Luo Ji glanced at the tank that looked like an oxygen tank, and he probably already knew the principle of use of this thing.

As for Luo Ji's term "harpoon gun", Ye Xuan, who was standing there, tilted her head and looked thoughtful.

For her, this was obviously a word she had heard for the first time, but the name Harpoon Gun was quite appropriate, so she simply called it that.

After entering the actual operation, Luo Ji obviously wanted to follow them and dive into Mirror Lake in order to see clearly.

For this reason, people from the Ordnance Research Department have already prepared oxygen tanks and diving suits.

Although these devices had been manufactured many years ago, this was Luo Ji's first time wearing them, and they were more cumbersome than expected.

It is already very difficult for normal humans to dive into the sea wearing this suit and perform some simple underwater tasks. It is really difficult to expect them to be able to fight underwater.

In this way, the person responsible for operating the harpoon gun underwater is a soldier from the Lizardman Underwater Combat Force.

Wearing special combat uniforms and a full set of harpoon gun equipment, everyone, including Luo Ji, dived into the water after making all preparations.

In order to ensure the safety of their Emperor, the people from the Ordnance Research Department specially found two lizardman soldiers to protect him on the left and right.

To be honest, in Luo Ji's opinion, this battle was a bit overblown.

It’s not like he can’t swim? How could he still drown while wearing a diving suit and carrying an oxygen tank?

After complaining a few words in his mind, Luo Ji was too lazy to continue struggling and quickly turned his attention to the scenery under the lake.

The weather today is very good, it is a cloudless and sunny day, so the visibility under the lake is also quite high.

From the surface of the lake, the scenery of Mingjing Lake can be said to be breathtakingly beautiful, but from below the lake, Luo Ji felt as if he was in another beautiful world of aqua blue.

Of course, at this time, he was not immersed in the beautiful scenery in the water and forgot about business. His entire attention quickly shifted to the lizard soldier equipped with a harpoon gun.

They did not dive too deep. Even in this sunny weather, once they dived too deep, the underwater visibility would begin to plummet, and eventually they would be unable to see because the depth that sunlight can reach is also limited.

For this reason, the test of the harpoon gun only needs to be maintained at an appropriate depth.

At this time, it can be clearly seen that in order to conduct this test, the people from the Ordnance Research Department have made a simple arrangement at the bottom of the lake in advance.

Looking from a distance, Luo Ji immediately saw two targets suspended there in a special way in the lake, one near and one far.

After diving to a certain depth, the lizard soldier turned his head and looked in Luo Ji's direction.

In response, Luo Ji made a "start" action quite simply.

The test of the harpoon gun officially began at this moment.

The lizard soldier was obviously familiar with the entire operation beforehand. He unscrewed the equipped gas bottle quite neatly and filled the barrel with a special harpoon.

Then, he picked up the sizable harpoon gun quite neatly. After taking a brief aim, he pulled the trigger, and with a burst of bubbles, the special harpoon flew out and carried the water directly.

Shot at the closer target.

Because he was in the water, during the whole process, Luo Ji could see the trajectory of the harpoon gun clearly, with a different kind of beauty.

At the same time, the attack principle of the entire weapon was exactly what Luo Ji expected.

The firing principle of general thermal weapons is to propel and launch based on the high-pressure gas generated by the rapid combustion of gunpowder, but the harpoon gun is simpler, directly using the gas in the high-pressure gas bottle to propel!

This is also the main reason why harpoon guns can be used underwater.

Just as Luo Ji was thinking this, the harpoon shot out directly hit the target in the distance.

Although the target was not small, it still showed considerable accuracy in being able to hit it.

Later, while the lizard man reloaded the harpoon gun, another lizard man quickly swam to the side of the target and picked it back up.

It wasn't until the target was brought to him that Luo Ji finally saw clearly that the wooden target, which was almost five centimeters thick, had been directly penetrated by the harpoon!

At the same time, it must be mentioned here that as a user of magic weapons, Luo Ji can clearly judge that the blow of the harpoon gun just now did not trigger the magic spell on the gun at all!

Sure enough, after finishing loading the second harpoon, the lizardman soldier turned around again and asked Luo Ji for instructions.

The target placed farther away is undoubtedly prepared for the next spell attack!

After getting Luo Ji's permission, the aqua blue magic crystal on the harpoon gun was lifted up again and began to shine. Then, the mysterious incantation in the entire circle around the water magic crystal lit up...

…

The next second, the harpoon flew out, shocking Luo Ji.

"So fast!"

The moment the harpoon came out of its body, the speed was astonishingly fast. The water flow that was supposed to form resistance seemed to become the power of the harpoon at this moment.

In just the blink of an eye, the flying harpoon hit the target farther away with astonishing momentum.

There was no need to confirm the power. The rate of fire alone, coupled with the attack range of over three hundred meters, was enough to astound Luo Ji.

It is indeed a magic weapon, and its performance is really unparalleled. According to the rate of fire and range, as long as the attack is launched while aiming at the target, the average fishman may not have time to react at all, and he will still be shot?

As for power...

The lizard man underwater quickly picked up the target just like before.

The harpoon penetrated the target again without any surprise.

However, Luo Ji, who was very focused, quickly discovered a problem. The thickness of the target seemed to have become thinner...

Then, Luo Ji, who seemed to realize something, quickly motioned for everyone to return to the shore.

And after taking the target and making a second confirmation, he clearly discovered that the thickness of this target was indeed not as good as the previous one.

If the previous one was more than five centimeters, then the thickness of this target should be only three centimeters by visual inspection.

However, this target is made of metal...
Chapter completed!