The key is whether these tiny needle-shaped lightning bombs can be quickly installed on short-range attackers, and whether short-range attackers can have the ability to fire continuously.

This is especially important for continuous firing.

Jiang Feng stared at the drawings and pondered repeatedly, and suddenly, his eyes lit up and he thought of a very unique structure.

He was to devise a double-tensioned firing structure for continuous operation of the short-range attacker. To put it simply, this structure is that the two tension springs are connected with each other, and when one tension spring pops out, the other tension spring is actually installed, and when the other tension spring pops out, the first tension spring will be installed again.

In this way, the two tension springs can be used continuously and repeatedly, and at the same time, the time of installing the tension springs is saved.

That's right, it's two tension springs!

In addition to the difficulty of the tension spring, there is also the difficulty of the trajectory, if the two tension springs are used continuously, the trajectory between them cannot be used in the same channel, is it not a one-time launch of forty needle-shaped thunderbolts, instead of eighty-one?

Jiang Feng looked at the drawings seriously, he looked at the umbrella-like shape, and suddenly had a new idea.

His thinking was too limited just now, why couldn't he be open to research novel designs?

The two tension springs each have their own trajectory, one of which is responsible for the umbrella-shaped coverage, that is, a large area of shooting, if this is the first time, then the second time, replaced by another tension spring, responsible for another trajectory, this trajectory is located on the umbrella-shaped umbrella rod, the umbrella tip is the firing port, you can design this other more powerful lightning bomb!

Type II Thunderbolt Bomb is the kind of Thunderbolt that is suitable for medium- and long-range attackers! It can be the thickness of a thumb, and its main feature is that it has a strong explosive force and a more obvious destructive force. However, because it is a short-range attack, the required tension spring requirements are average, and more importantly, accuracy is required.

The first net attack, the second is a point attack, which is easier to catch the opponent off guard, and if the first complete attack cannot give the opponent a fatal blow, the second point attack must achieve good results.

The two attack methods, complementing each other and being used repeatedly, will be an almost perfect attack method.

Everything was straightened out, and Jiang Feng's heart suddenly brightened.

Then, he sorted out his thoughts and first refined the Type 2 Thunderbolt Bomb.

And this time, Jiang Feng didn't go to the yard to do another test, and the needle-type thunderbolts were as strong as ever, not to mention the finger-thick thunderbolts.

In addition, regarding the mass firing function of needle-type thunderbolts, Jiang Feng did not take much effort to overcome the difficulties, he designed a kind of magazine, which can be loaded with eighty needle-type thunderbolts at a time, and he only needs to install the clip in the bullet slot of the short-range attacker, and he can use the tension spring to directly shoot all the needle-type thunderbolts.

According to the volume of this umbrella-shaped short-range attacker, six such magazines can be installed at one time, and in order to echo the Type 1 Thunderbolt, the Type 2 Thunderbolt is also designed with a loading capacity of six.

That is, this short-range attacker can fire twelve times in a row, including six needle-type lightning bullet network attacks and six type II lightning bullet point attacks.

All night, Jiang Feng spent the night refining short-range attack weapons in the refining room.

......

The next day, Jiang Feng came to the third class classroom of the junior high school as usual and listened to the lecture of teacher Zhao Pusu.

Fortunately, Mu Yingxue did not come to harass him again, but made the classroom of the third class of junior high school seem a lot more deserted. After the theoretical class was over, and then the practical class, Jiang Feng did not run away this time, but stayed in the refining room in a regular manner, and followed the other students to carry out the refining task together.

Although he doesn't need task points, he still runs before and after, and works for them, which makes these students very moved.

It's just that when their task was about to be completed, Jiang Feng took the time to go to the deployment office, found Old Man Wu and chatted with him for a while, and asked for some information by the way.

But this time Jiang Feng did not accept the task again, even if Old Man Wu offered Jiang Feng a high price.

Jiang Feng returned to the third class of the elementary school, and the refining task arranged by Teacher Zhao Pusu had been successfully completed by the two groups, Jia Gui saw that Jiang Feng's face was good, so he smiled and said: "Boss, I haven't been together for a long time, this time the boss should break the bank!"

"Okay, I'm going to have a treat today. ”

Jiang Feng waved his hand and took all the students of the third class of junior high school to the restaurant outside the school, and everyone drank happily.

It can be seen that Jiang Feng is in a good mood, but when asked about the reason, Jiang Feng didn't say a word.

Of course, Jiang Feng was in a good mood, because he spent the night yesterday, and finally achieved something, the short-range attack weapon had been baked, and the needle-type thunderbolt bomb and the second-type thunderbolt bomb had also been prepared, and this magic weapon-level attack weapon would become a must-have weapon for him!

added a life-saving treasure, and Jiang Feng was naturally very happy.

After drinking and eating, everyone dispersed, Jiang Feng paid for the meal, but did not go home. Instead, after leaving the restaurant, he took a carriage and rushed towards Yandang Mountain.

However, going to Yandang Mountain, it is not Yandang Shanfang City, Yandang Mountain is lined up with wild geese, hundreds of miles longitudinally and horizontally, and the place where Jiang Feng goes is the closest mountain to Yangping City, and that area is still hundreds of miles away from Yandang Shanfang City.

I went to that place for a reason.

The materials that Jiang Feng has now have are no problem in refining short-range attack weapons, medium and long-range attack weapons, and even ultra-long-range attack weapons, but the core content of the lightning egg, which is now called the thunder and lightning bomb, is the most indispensable thunder source stone.

When the short-range attacker, needle-type lightning bomb and second-type lightning bomb were refined, the thunder source stone was basically gone. As the main ingredient of the thunder and lightning bomb, without the thunder source stone, it is equivalent to a bow and arrow without arrows, and it has nothing to show for itself.

Therefore, during the practical class this morning, Jiang Feng went to the deployment office and chatted with Old Man Wu for a few words, and the main point was to ask Old Man Wu about Lei Yuanshi.

It's a pity that Old Man Wu doesn't have Lei Yuan Stone on hand, and he doesn't know the channel to buy Lei Yuan Stone, the key point is that Lei Yuan Stone itself is expensive, and he can't buy it if he wants to.

However, Old Man Wu gave Jiang Feng a hint, it is said that when it rains on a cloudy day, the thunder source stone has the attribute of gathering thunder, so it is not difficult to find, as long as it is cloudy and thundery, which mountain thunder is dense, there is likely to be the existence of thunder source stone.

At the same time, Old Man Wu also reminded him that Yandang Mountain is said to have a thunder source stone, but the reserves are unknown, if you are lucky, you may be able to find a thunder source stone in Yandang Mountain.