Shenhao started after the college entrance examination

The noise of guns mainly comes from the noise generated by the expansion of high-pressure gas out of the barrel and the shock wave generated by supersonic gas when firing.

This is the main source of noise, the loudest source of noise, and the sound that silencers mainly solve.

The second source of noise is the shock wave noise generated when supersonic bullets fly at supersonic speed after they are fired.

This noise is relatively small compared to the first noise, but the absolute volume is very large and sharp, so it is also a big noise source.

The third noise is the noise emitted by the gun itself.

It includes the impact sound generated when the bullet is fired, and the sound generated by the 23 collisions between the parts of the gun when the subsequent mechanical cycle completes the ejection of the shell and reloads it.

This sound is obviously smaller than the previous two noises, but it is not negligible. It can only be said that it is far lower than the previous two noises. When there is only the noise generated by the gun itself, most people will not associate it with the sound of the gun firing.

Ordinary people's understanding of the sound of guns still comes from the first type of noise, which is the so-called "bang bang bang" sound.

Now Kitaaki Naoto uses a large silencer that is three times the length of an ordinary silencer, and replaces supersonic bullets with subsonic bullets, which greatly suppresses the two largest noise sources.

As for the final mechanical noise, there is actually a solution, that is, to replace bolt-action firearms with semi-automatic or automatic firearms.

However, considering that replacing bolt-action firearms will greatly reduce combat effectiveness, Kitaaki Naoto naturally did not replace bolt-action firearms, and still insisted on using the automatic M4A1 assault rifle.

After all, pure mechanical noise is relatively small and is usually not associated with gunshots.

In addition, he is an emergency personnel and may not really shoot, so he naturally chose an automatic assault rifle with stronger combat capability.

The No. 3 VIP elevator stopped on the 20th floor, and everyone filed out.

After walking out of the elevator, the crowd changed their formation, with Hiroishi Nishiki and Masaaki Sangen walking in front. The two of them were holding tasers, and the tasers didn't make much noise! ​​

Naoto Kitaaki followed behind the two. If the two Tasers failed to control the two targets and an unexpected situation occurred, Naoto Kitaaki would make up the shot.

Yanagawa Yasuyoshi followed at the end, pushing the dining cart, which would be responsible for transporting Hank and Lucy.

When approaching Room 2008, Hiroishi Nishiki had already used a portable infrared thermal radiation detector to scan the interior of Room 2008.

They all wore soft-soled shoes to reduce the sound of their footsteps, so naturally they didn't attract the attention of Hank and Lucy.

Hiroishi Nishiki showed the portable infrared thermal radiation detector to Masaaki Sangen and Naoto Kitaaki, so that the two could have a clear idea.

When the three came to the door of Room 2008, he saw the screen of the portable infrared thermal radiation detector.They found that the two targets did not make any special moves, indicating that their actions had not been discovered.

Kitaaki Naoto took out an electromagnetic card. He looked at Nishiki Hiroishi and Sanyuan Zhengzhang. The two nodded slightly, and then Kitaaki Naoto placed the electromagnetic card in the induction area of ​​the hotel door.

‘Ding~’

‘Zizizi~’

The induction area passed the magnetic card verification and then automatically opened the door.

Although this sound was very small, Hank and Lucy in the room had heard it and they took action immediately.

Both of them were well-trained field staff of intelligence agencies. When they heard the sound of the door lock, they knew there was a problem, so they wanted to take out the pistol under the pillow.

Although the use of firearms may create too much noise, thereby exposing their identities, the current situation is unclear, so how can they care whether their identities will be exposed?

However, their actions were not as fast as Nishiki Hiroishi and Sanyuan Zhengzhang!

When the door opened, Hiroishi Nishiki and Masaaki Sanyuan rushed in immediately and fired Tasers at Hank and Lucy.

‘Tap~Tap~’

With two slight noises, the two Tasers hit the target 637 times respectively.

Whether it was Hank or Lucy, they fell to the ground trembling when they were hit by the Taser. The power of this electric shock gun is not something that humans can withstand.

Naoto Kitaaki still held the M4A1 assault rifle to prevent accidents, while Hiroishi Nishiki and Masaaki Sanyuan released the Taser and began to deal with Hank and Lucy further.

There is a detail here. After the two Tasers were fired, no confetti flew out. This is because their Tasers were not purchased commercial products, but Tasers made by Renyi Security Company itself.

The technological content of Tasers is relatively low, so Renyi Security Company has long overcome related technical problems.

Hiroishi Nishiki and Masaaki Sanyuan tied up Hank and Lucy's hands and feet with cable ties, sealed their mouths with tape, and tied up their bodies with ropes to prevent them from struggling.

The whole binding process took less than two minutes. It seems that we have to praise them for being Japanese people. They are quite proficient in the art of binding? .