The craftsmanship of the crossbow arrow is very exquisite, its length is about 20 centimeters, there are no arrow feathers on the tail, and the arrow at the front end is shining with sharp metallic light, which looks obviously not ordinary iron.

But this is normal, regardless of the size and model of the arrow tower, this thing can be regarded as one of the top long-range buildings in the Beacon Era, and it is more difficult to forge, which can be regarded as expected by Zhou Ran.

Zhou Ran picked up the crossbow arrows, divided them one by one, including him, and then lowered his head and picked up all kinds of tools, and began to study.

There is nothing too special about the shaft part of the arrow, that is, the ordinary wood is coated with a layer of black paint, probably to have a concealed effect, but Zhou Ran does not plan to use the method of point shooting, and in the case of continuous shooting, it doesn't matter if it is hidden or not.

There is no big problem with the arrow shaft part, not even Zhou Ran, a few craftsmen feel that it is not difficult to make after a general glance.

In order to make spears and long-handled weapons, they originally stored a large number of molds in the assembly line factory, and there were also molds the size of arrow shafts.

The more troublesome part is the arrowhead, the arrow of this kind of arrow is not double-edged, but a cross-shaped arrow with four blades, and the forging is very fine.

Forged into a four-bladed cross-shaped arrow, in essence, is to improve the attack ability of the arrow, and once it causes trauma to the biological individual, this type of wound is very difficult to heal and bandage, which means that even if you can't kill the opponent in one hit, you have to give him a debuff of bleeding and serious injury.

This is a good idea for the design of a weapon, but it is a little more difficult to replicate it.

Fortunately, Zhou Ran had also observed the structure of the crossbow bolt before, and the part that could actually jam the crossbow arrow was a very small block-type structure in the connection between the arrow shaft and the arrow, which could ensure that the arrow stayed in the storage tank well and would not fall off or be mixed with other arrows.

The structure of the arrow is actually not that important, but in order to ensure lethality, Zhou Ran and several other craftsmen studied it and began to try to forge it.

In terms of Zhou Ran's ability, let alone forging a four-edged cross arrow, even if he was asked to take two pieces of iron ore and make a desolate weapon with his bare hands, it would not be a problem.

As long as the flame of the sun burns, melts the metal into molten iron, and shapes it with the power of the divine soul, any basic shape can be done.

But the problem is that several other craftsmen don't have this craftsmanship, most of them are double-edged arrows like ordinary bows and arrows, and only one has a good craft, forged a three-edged arrow, in essence, the difference between three-edged and four-edged is not too much.

Zhou Ran looked at the three-edged arrowhead, he made a three-edged and four-edged mold with his own hands, poured molten iron, and waited for them to cool and solidify into shape, and then let these craftsmen and some of the people on the assembly line start to try forging and polishing.

Although it is said that with the help of many tools such as whetstones, it still takes too much time to forge a four-edged arrowhead, and it takes about 15 to 20 minutes to produce a complete four-edged arrow on the assembly line.

It only takes two minutes to produce a double-edged arrow, and a three-edged arrow only doubles the time, and the consumption time reaches only four minutes.

Zhou Ran made a very decisive decision, and decided to cast the three-edged arrow, and as soon as he decided to do the next, things were very simple.

First of all, a large number of molds for three-edged arrows were manufactured, and then the molds were put in, and then the casting production line was part, and then there was nothing to worry about, and he waited for the production of arrows to be finished.

The speed at which the task was completed was much faster than Zhou Ran imagined, and it only took them less than half a day to add up.

There are still nine and a half days left for production.

In the beginning, it took a little time to produce three-edged arrowheads and assemble them into shafts.

However, as his proficiency increased, his speed became faster and faster, and he was able to craft four three-edged arrows in just two minutes.

Zhou Ran set up a furnace on the side and began to smelt some metal ores with relatively high melting points and basically unusable, and he brought these in just to polish the time, and by the way to see if he could produce useful things.

It was the simple trap and quick building that gave Zhou Ran inspiration, and he planned to make a few magic weapons that were not needed much and were driven by manpower.

First, using the solid metal that holds a large amount of aura as the substrate, Zhou Ran shaped them into the shape of a round ball, added runes of floating, qi gathering and thunder and lightning to it, and injected it with spiritual rhyme, and the magic weapon was completed.

[Thunder Ball: Celestial-level props. Inferior magic instruments. A very special magic weapon, after being placed in a designated place, can absorb the surrounding heaven and earth aura for charging, and can release 150 thunderbolts in a row when it is in a full state. 】

That's right, this is the immortal version of the magnetic storm coil, after thinking about it for a while, Zhou Ran still thinks that this prop is more suitable.

Although he himself is better at the power of the sun, after all, the true yuan is a thunder attribute, and the refining magic weapon is naturally based on the thunder attribute, and it is still at the end of the rainstorm season.

Although there is not much rain, the dark clouds in the sky are still very thick, and if you are lucky, when you release the thunder, you can also trigger a thunder in the sky, doubling the power of the attack.

With the first Thunderball crafted successfully, the rest of the crafting time will be much faster.

It is a low-grade magic weapon itself, and it doesn't need to inject too much spiritual rhyme, after all, it doesn't need to be driven by manpower, as long as it is placed in a certain location, so that the speed of manufacturing is faster than that of ordinary low-grade magic weapons.

After 9 and a half days have passed, Zhou Ran has already produced 5 thunder balls, but this is basically the limit, and the materials that can make thunder balls in the territory are basically consumed.

On the other hand, in the past nine and a half days, the speed at which the assembly line can produce three-edged arrows has also increased, and in the end, a total of more than 54,000 arrows have been produced.

Zhou Ran calculated, the number of 30 arrow towers that can be divided into more than 1,800 strokes is about 1,800 strokes, even if the continuous shooting mode is used, it can last for about 15 minutes, which is enough.