Bright Sword starts with the grenade flat.

Chapter 7 Li Yunlong’s beheading tactics
  The reason why these two anti-material sniper rifles are good at reducing recoil is because the short recoil of the Barrett M82A1 barrel and the muzzle brake can reduce the recoil kinetic energy by %. of kinetic energy.

In other words, Barrett's kinetic energy of 6 joules is reduced to only joules of kinetic energy, and the MG Bobcat anti-material sniper rifle is even more powerful.

Because it adopts the principle of long recoil of the barrel and the muzzle brake, its recoil force is directly reduced to 47%. The recoil force when shooting is similar to that of AK, so it can even stand up like an assault rifle. Walk and shoot.

As for what is long barrel recoil and short barrel recoil, this is related to the principle of gun recoil.

When the gun is fired, the gunpowder of the bullet in the gun chamber explodes. Because it is restricted by the barrel, the force of the gunpowder explosion can only be divided into two parts. One part is to push the bullet forward and leave the barrel, and the other part is to push the barrel to move backward. .

If the barrel is hard-connected to the gun body, then the force of the barrel's retreat will be transmitted to the gun body, and then transmitted to the human body through the butt, making the human feel the force of pushing back, so the more powerful the bullet will be. The recoil felt will naturally be stronger. After all, Newton said that forces are equal to each other.

As for the barrel recoil, it means that the barrel that is subject to recoil is not directly connected to the sound of the gun, but is in the form of a slide rail. The barrel is connected to a recoil return spring or some buffer system.

In this way, the recoil force experienced by the barrel will be compressed by the deformation of the spring, thus absorbing part of the recoil force. Because of the more Newtonian mechanical principles, the force will not disappear and will only cause the object to move or deform.

The deformation of the non-returning spring will naturally consume part of the recoil force. The amount consumed depends on the amount of force that the spring can absorb.

After being absorbed by the spring, the force transmitted to the gun body and the gun stock to the human body will naturally be much smaller, so the deformation of the human body will naturally become smaller.

After all, if the deformation of the human body occurs too much, fractures will occur. This is why the butt of the gun rests not on the shoulder blade, but on the shoulder socket, where the muscles are thickest and most elastic.

As for what is short barrel recoil and long barrel recoil, this is simpler. Short barrel recoil refers to the distance the barrel moves backward when the bullet is fired. For example, the barrel of the Barrett M82A1 will move behind the bullet. It moves back two and a half centimeters when firing, so this is the short recoil of the barrel.

The barrel of the MG6 Bobcat will move back twenty centimeters when the bullet is fired, so this movement distance is naturally called the long recoil of the barrel.

Because the greater the distance the barrel moves backward, the greater the deformation of the barrel's return spring, so the more recoil is naturally absorbed.

Of course, the long recoil of the barrel is not without its disadvantages. For example, it will affect the rate of fire. The Barrett M82A1 and MG6 Bobcat are both semi-automatic, but the Barrett can fire all ten bullets in the magazine within three seconds. Go out, but the Bobcat can only fire five bullets in three seconds.

There is no way, after all, the farther the barrel retreats, the longer it will take to rebound and reset.

Liu Xiu folded his thin quilt and tied it to the launcher of the grenade. He then used it as a gun and put it on his shoulder to try. The effect was quite good.

At least the area in contact with the shoulders is a soft and elastic large quilt bag, which should have a very good cushioning effect.

This is like a gymnast laying a sponge cushion on the ground to cushion the impact of falling.

Hu Zi on the side also understood a little bit about Liu Xiu's operation, so he asked:
  "Are you trying to put the grenade on your shoulder and fire it? Can you withstand the recoil of the grenade?"

Liu Xiu just nodded to Hu Zi's question and didn't say much. Didn't he know that the recoil of the grenade was strong? If he wasn't that big, would he use his clothes as a cushion?

Just as Liu Xiu was loading the grenade with cushion bullets made of quilts, Li Yunlong used his binoculars to look at the temporary command post that had been set up by the little devil on the opposite side of the hill, and immediately called Wang Chengzhu.

And this Wang Chengzhu is naturally the mortarman of the new regiment, and his cannon fire is very accurate. After Wang Chengzhu came to Li Yunlong, he immediately reported:

"Report to the leader, Wang Chengzhu is waiting for instructions!"

In response, Li Yunlong said to Wang Chengzhu without looking back:
  "Come here, have you seen the tent on the hillside? Can your cannon reach it?"

After Wang Chengzhu heard Li Yunlong's words, he immediately raised his thumb, closed his left and right eyes for a moment, and said helplessly to Li Yunlong:
  "Captain, the distance is too far and is beyond the range!"

In response, Li Yunlong did not intend to give up this opportunity to take down the Japs headquarters, but continued to say to Wang Chengzhu:
  "The tent is the little devil's headquarters. This little devil is cunning enough. He set up the tent outside our shooting range. How can we think of a way to shoot him!"

Sure enough, after Wang Chengzhu heard what Li Yunlong said, he said to Li Yunlong:
  "Captain, move forward five hundred meters, that's it!"

Li Yunlong also agreed unambiguously:

"Okay! Are you sure I can send you to the 500-meter position?"

Wang Chengzhu immediately nodded and said there was no problem, but then the conversation changed and he spoke softly to Li Yunlong:
  "But, Commander, we only have two shells left!"

When Li Yunlong heard Wang Chengzhu's words, he immediately cursed:
  "What are you talking about! Zhuzi, you loser, why don't you use it sparingly!"

Regarding Li Yunlong's anger, Wang Chengzhu said with an aggrieved expression:

"Captain, you have to speak with your conscience! When the Japanese attacked just now, you were the one who shouted the loudest, Zhuzi, kill that heavy machine gun for me..."

However, Wang Chengzhu was interrupted by Li Yunlong before he finished speaking. Li Yunlong stared at Wang Chengzhu and said:

"Be careful, I'll beat you up!"

Sure enough, Wang Chengzhu's cry of injustice was immediately blocked by Li Yunlong, but after Li Yunlong said this, his face immediately changed, and he smiled at Wang Chengzhu and continued:

"When the battle is over, I will reward you with half a pound of sweet potato burning! But you have to think carefully about how to destroy the enemy's headquarters with two artillery shells! If you miss, let alone the sweet potato burning. I still have to shoot you!"

Wang Chengzhu also assured Li Yunlong:

"Yes! Promise to complete the mission!"

After Li Yunlong explained the plan to Wang Chengzhu, he found Zhang Dabiao and asked Zhang Dabiao:
  "How about it, are the commandos ready?"

Regarding Li Yunlong’s question, Zhang Dabiao said:
  "Captain, just watch out! We are not as good as the little Japs when it comes to firearms, but when it comes to hand-to-hand combat, we Han people are his ancestors. I told the brothers that today we will teach the little Japs how to behave. It is okay to disrespect our ancestors. !”

(End of this chapter)