First of all, there is the issue of the main roaming weapon, and the roof crossbow is difficult to protect due to the long bow arm, and it is easy to destroy in battle. But if a thick layer of armor is added, then it will be difficult to fit into the roof of the car, and it will be difficult to repair on the battlefield.

The second attempt was to enlarge the JS9 and Type 47 5.88mm pistol rounds in equal proportions. However, Gou Cao tested it several times, and found that after amplification, the rate of fire and accuracy were different, and the CD decreased, and it exploded after a few rounds. If you want to thicken the chamber to increase the chamber pressure that the gun can withstand to avoid exploding, the position and size of the other parts need to be adjusted. It's a pity that Gou Ke didn't know much about firearm design, so he couldn't do it, so he had to give up.

Sure enough, getting a large-caliber firearm can't just enlarge the parts in equal proportions, otherwise heavy machine guns and assault rifles don't need to be independently developed.

However, Gou Cao quickly thought of another solution. That's the electromagnetic gun.

This thing appeared much later than the thermal weapons fired by gunpowder, but the main technical reason for limiting the appearance of electromagnetic guns was the miniaturization of power supply equipment, but it happened that the most important thing was the supply of electrical energy.

Theoretically, Gou Cao only needs to provide a power coil of sufficient power, and then use the transformer equipment to turn the current provided by the high-energy battery into ultra-high voltage electricity, and then supply the current to the electromagnetic coil in a short time, and the electromagnetic field will accelerate the projectile to a sand speed in a short time.

He Hehe didn't know much about this, after all, it was not in his professional scope.

But with Cortana's help, Gou Ke soon created a prototype with a turnable muzzle that could fire a 20mm in diameter and 500mm long steel pointed iron rod, with fins at the end of the rod popping out of the muzzle, thus stabilizing the trajectory.

However, it is a pity that in the actual test firing, the muzzle velocity of the muzzle is insufficient, resulting in insufficient penetration of the iron rod, and the accuracy of the electromagnetic gun is not enough.

After several adjustments, Gou Cao gave up his attempt to do fine work with his own rough craftsmanship, and simply positioned the electromagnetic cannon as a stupid black and coarse weapon.

The muzzle velocity of the first prototype electromagnetic gun was insufficient because the rotation mechanism limited the power of the electromagnetic field, so Gou Cao simply canceled the rotation function of the electromagnetic gun, and instead installed the electromagnetic gun in the front of the car and turned it into a fixed gun, most of the barrels were buried inside the car body, and only a small section was extended when firing. This design greatly enhances the protection of the rover's primary weapon, while increasing the acceleration power of the electromagnetic field and increasing the muzzle velocity.

Due to the rudimentary firing of the parts of the electromagnetic gun, the degree of precision is insufficient, and the accuracy is difficult to improve, so it is definitely not enough to fire a solid iron rod for long-range sniping.

So Gou Ke simply increased the muzzle radius to 30 mm, which was used to fire fixed shotguns loaded with 7 rounds of 15mm steel-clad lead balls, or 30mm heavy single-head shells. Both reloads have been tested to penetrate 20mm thick steel shields when attacking hostile vehicles at close range. However, after each launch, twenty seconds of recharge are required before the next launch.

Again, there is the issue of mobile devices, the rover tires have been listed as a key attack position in several battles, but in terms of tire strength itself, there is not much that can be done. Originally, the best protection was the track, but unfortunately there was no track drawing.

However, as a compromise. Gou Ke added a layer of skirt armor to the outside of the tires. However, the skirt armor would restrict the steering of the tires, so Gou Cao simply eliminated the steering wheels. Instead, the six wheels of the rover were changed to independent drive and independent control.

This makes it possible to perform differential steering like a tank track, eliminating the need to reserve steering space for wheels and skirts like the front wheel steering, which increases the compactness of the rover's hull and the level of protection of the mobile device. This design can still be very vulnerable to attacks from the bottom, such as mines, but it will have to be improvised, until the track blueprints are found.

As a supplement to the firepower, Gou Ke changed the number of shooting holes from the original front and rear two on each side to two on each side of the front and rear to two on each side, and the reduced shooting holes were installed with a remote control excitation device JS9 submachine gun, in order to ensure the range and accuracy, each submachine gun has lengthened the barrel and fine-tuned the gun body.

The modified JS9 can no longer be considered a miniature submachine gun in all respects, and its performance is close to that of a full-size submachine gun, which is capable of accurate shooting within 100 meters. At the same time, the supply magazine was lengthened, increasing its ammunition capacity from 20 to 60 rounds.

By installing an automatic reload mechanism on these four submachine guns, which is modeled after the mechanical structure of the robotic arm, the JS9 submachine gun fixed to the rover can have a longer duration of fire. At the same time, after replacing the Type 47 5.8mm military ammunition, it also has a certain lethality to armor targets.

Due to the limitation of the explosion mechanism, the flour cannon cannot be used in rainy days, and the lethality of armored targets is close to zero, but it has a good effect on soft targets, and it can also interfere with the vehicles behind when being chased, so as to facilitate getting rid of them. So Gou Cao decided to specialize in this weapon.

The method is to open a nozzle suitable for spraying flour in the parking space, and a large amount of flour will be sprayed with high-pressure oxygen during launch, but it will damage the nozzle structure like the surface propulsion nozzle spraying flour. At the same time, an electric spark ignition device is installed next to the flour nozzle, so there is no need to risk throwing Molotov cocktails.

After the flour cannon is fired once, it takes about forty seconds for the oxygen and flour to be reloaded, and the next shot can be carried out after the reload. No more repairing the nozzle.

Finally, there is the highlight of this modification - the rocket booster. The YT-32 small solid booster rocket itself has the function of re-using after reassembly, and all that Gou has to do is to adjust the installation position of the two booster rockets so that the thrust center and the center of gravity of the vehicle coincide. Then add the reloading device of the rocket fuel module, and the next round of boosting can be carried out 20 seconds after the completion of one round of rocket boosting.

However, rocket fuel production consumes a lot of energy and consumables, and the production cycle is long, so in normal times, only six rocket fuel modules can be prepared, plus two installed in rockets, and only four injections can be carried out in a battle. But it's enough.

A single rocket jet can accelerate the rover to a maximum of 300 km/h, and in order to accommodate this high speed, the rover's front armor has been strengthened, and a more rugged pear-shaped ram angle has been installed on the nose of the rover. At the same time, a shock absorber is installed in the core part of the rover to prevent the delicate equipment on the car from being damaged in the impact.

Quite a simple and crude mod, but tough enough that it is reliable and effective. After all, the front electromagnetic cannon has the greatest killing effect at close range, and with the rocket booster, Gou Ke can quickly approach the local vehicle and quickly destroy the opponent with a violent impact and the shotgun projectile.