"I really didn't expect it, let's go together!" Lu Jiadong saw that Yang Limin had the same idea as himself, and his originally tense face couldn't help but relax, revealing a slightly relieved smile.

Seeing this, Yang Limin couldn't help but smile: "Indeed, but I'm worried that if I overturn and start over, I'm worried that it will affect the development progress, after all"

Although Yang Limin did not continue, Lu Jiadong understood what he meant, since November, the Provincial Department of Science, Technology and Industry for National Defense has issued an emergency notice to the province's military industrial system, requiring all arsenals to speed up the production of military products.

And Lu Jiadong's original intention was to develop a light grenade launcher before the war, even if it could not be mass-produced, it would be good to make a few samples and send them to the front line.

Because of this, when Lu Jiadong learned that the calculated values did not match the technical and tactical indicators, he would think about it for so long, after all, Lu Jiadong, as a traverser, knew the exact time of the war, and therefore his urgency was even more than ordinary people, but even if he was in a hurry, when a weapon and equipment could not meet the specified technical and tactical indicators, he had to overturn and start over, otherwise even if it was developed, it would not make much sense, so Lu Jiadong made up his mind:

"Even if it affects the progress, you can't build a weapon and equipment that doesn't meet the technical and tactical indicators!"

Listening to Lu Jiadong's words, Yang Limin couldn't help but breathe a sigh of relief, he didn't know the specific time of the war, but the tense atmosphere of preparing for the war also made him feel the approaching pace of the war, so he somewhat understood what Lu Jiadong meant, that is, to send this equipment to the battlefield as soon as possible, for a weapon and equipment, the best testing ground is the battlefield of real swords and guns.

However, while racing against time, Yang Limin's rigorous and serious energy did not slacken, on the contrary, he was more responsible than before, when the calculated values were inconsistent with the planned technical and tactical indicators, Yang Limin did not compromise with time, but made repeated calculations, until he got the exact data, he found Lu Jiadong.

In this way, Lu Jiadong and Yang Limin pushed the previous locking mechanism, but the new locking mechanism was so easy to come up with, so in the next few days, the two of them almost soaked in the office of the technical department, meditating on the design drawings one by one, flipping through a book of technical information to find possibilities, Lu Jiadong even often closed his eyes to recall the locking mechanism of those classic light weapons in later generations, but no matter how hard he tried, the progress of the new locking mechanism was almost zero.

As time passed, Lu Jiadong's mood became more and more urgent, and his thoughts became more and more messy.

"Da ~~, Da ~~!" It was another sleepless night, and the morning was outside the factory quiet, which also made the gunfire on the militia company shooting range particularly harsh.

Yang Limin rubbed his cheeks, looked at Lu Jiadong who was standing by the window, and said with a smile: "I started practicing target shooting so early, and it seems that this shot is still our 78 style!"

"78 style?" Lu Jiadong listened to Yang Limin's words, still standing motionless by the window, Yang Limin saw this and thought that Lu Jiadong was overworked and didn't hear his words clearly, so he walked up to Lu Jiadong:

"That's right, it's 78 style!" As he spoke, Yang Limin looked at Lu Jiadong, whose eyes were already red and his face was pale, and couldn't help but say:

"Xiao Lu, we all eat and live here these days, and it's not a way to go on like this, or you go back and rest first today."

But before Yang Limin finished speaking, Lu Jiadong raised his hand to interrupt him, and then turned his face to look at Yang Limin, who was also bearded and red:

"What does our Type 78 bolt lock look like?"

After listening to Lu Jiadong's question, Yang Limin was a little strange, but he still replied without thinking: "Bolt rotary type"

But before he finished speaking, Yang Limin's eyes couldn't help but light up, looking at Lu Jiadong in front of him, a trace of inexplicable excitement appeared on his stiff face:

"Little Lu, you mean"

"That's right! I've found so much information and thought of so many ways these days, but our thoughts are all focused on heavy machine guns that fire high-power ammunition, so why haven't we thought about the locking mechanism of simple and practical ordinary firearms!"

"That's right!" Yang Limin slapped his thigh, and he couldn't suppress the excitement on his face: "Such a simple organization is in front of us, how can we do it?"

Saying that, Yang Limin couldn't help sighing, and then smiled self-deprecatingly: "It's really like you said, there was really a problem with our previous thinking, if it weren't for the gunfire in the early morning, the two of us wouldn't know how long we would have thought about it!"

Listening to Yang Limin's words, Lu Jiadong couldn't help laughing, if you want to be in peacetime, the 78 type is such a close reference firearm in front of you, the two of them are not unexpected, but due to the urgency of time, coupled with their own eagerness, so that the two of them all focus on the high-power firearms mechanism, plus in the closed environment of the technical department in recent days, the thinking is further narrowed, if it weren't for these gunshots, I really don't know when I would think of it.

Now that the idea was determined, the two of them immediately returned to their seats, picked up the pen in their hands and began to wave on the paper, and it didn't take long for the new locking mechanism to be designed, this locking borrowed from the principle of the 78-type firearm, using the bolt rotary locking mechanism, but Lu Jiadong They improved it, mainly by resetting the spiral shaping groove in the bolt frame and the rotating bulge on the bolt.

In order to reach the grenade launcher automaton to push the grenade into the chamber, the spiral shaping groove on the bolt frame matches with the spiral protrusion on the bolt, so that the bolt rotates and locks, and is supported on the locking teeth on the barrel interception. In this way, the transfer of the locking support surface of the light grenade launcher not only increases the safety of weapon shooting, but also makes the receiver convenient to use light materials such as aluminum alloy, simplifies the heat treatment process, and achieves the purpose of reducing the weight of the light automatic grenade launcher.

Since the most critical locking mechanism is solved, the development progress of the light automatic grenade launcher has been put on the fast track, the light grenade launcher adopts the traditional firearm layout, in addition to important parts, a large number of aluminum alloy materials, the principle of air conduction adopts the "air blowpipe" type and the barrel boring structure, a bit similar to the M16 gas conduction mechanism.

The overall structure consists of a body tube - a casing assembly, an automatic machine assembly, a recoiling spring assembly, In order to further reduce the recoil, Lu Jiadong added an independent split secondary buffer at the tail of the receiver of the grenade launcher to make the automaton decelerate when it is blocked in the shell throwing position, so as to achieve the purpose of slowing down the recoil, slowing down and storing energy.

As a result of all these measures, the weight of the grenade launcher was greatly reduced, to only 10.5 kilograms, and the total weight did not exceed 15 kilograms even with a six-round drum feeder, which was enough for a different soldier to handle easily, and if two co-shooting co-shooters carried ammunition, it was enough to cope with a limited offensive and defense.

In terms of operation, due to the use of traditional firearm structure, there is not much difference between the shooting method and firearms, as long as ordinary fighters can shoot guns, they can easily operate this light grenade launcher, and the butt is made of wood, and the shoulder rest and cheek are also in place, so it is not difficult for soldiers to operate!

At the same time, in order to increase safety, Lu Jiadong also set up a trigger fuse and a failure fuse on the light automatic grenade launcher, of which there are two inadequate fuses, one is set on the firing machine, because the firing pin is located through the bolt pin located at the tail of the bolt frame, so when the bolt is not completely locked, the firing pin protrusion is insufficient and cannot be fired, which plays the role of insurance; the other is located in the front of the transmitter, when the bolt frame is not re-entered into place, the hammer is locked by the non-locking bumper and cannot be fired.

As for ammunition, because the automatic grenade launcher requires high power and long range, the previous integrated grenade obviously cannot meet this requirement, so Lu Jiadong improved the ammunition, removed the original integrated fire, replaced it with a cartridge, and installed it behind the bomb body, so that it can meet the needs of the two grenade launchers, and can also make the production not complicated, and the warhead also adopts a new warhead designed by Yang Limin.

After some improvements, the muzzle velocity of the light automatic grenade launcher reaches 200 meters per second, the maximum firing range is 1900 meters, and the effective firing range is 800 meters.

At this time, however, the Wanshan factory had already received a notice from the provincial department and began to produce military products at full capacity, and the workers of the military factory worked in three shifts to step up the production of weapons and ammunition in the form of using people and machines, and sometimes they had to borrow manpower from the labor service company to relieve the pressure, and they could not spare manpower and machines to try out the production of light grenade launchers.

Lu Jiadong had no choice but to rub the machine and the manpower, and reluctantly built 5 light grenade launchers, and at this time, the time also unconsciously stepped into 1979!

ps: Yuzu asks for a collection recommendation, I hope you brothers and sisters will support Yuzu more, give more collections, give more recommendations, Yuzu will work harder, thank you brothers and sisters!

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