One of the shells even hit the opposing friendly positions, causing dozens of casualties.

It takes at least a dozen seconds to adjust the muzzle angle, but if the rail car suddenly brakes or changes speed, it is too difficult to hit it.

The best way is to set up the cannon at the end of the metal suspension rail, and shoot directly at the front of the rail car, but the garrison could not have imagined that the invaders would dare to take the rail car to carry out a surprise attack, and all the artillery was erected on the defensive positions of the other two passages, and now it is completely too late to move the artillery again.

Of course, there is a second method, which is to coordinate the positions on both sides of the pit and lock the space in front of and behind the rail car, so that whether the rail car accelerates, slows down, or makes another emergency stop, there will always be two shells that can hit.

But the problem is that in this way, it is necessary to rehearse in advance, otherwise it will cause great chaos in the temporary scheduling, not to mention sealing the space in front and behind the rail car, as long as it can not hit the friendly forces on the opposite side of the pit, it is already a great luck.

"Idiots, it's all a bunch of idiots! What about electric switches? Cut off the power lines on the metal tracks! The lieutenant colonel roared angrily, in fact, he thought in his heart, it was not just as simple as cutting off the circuit, he even thought about blowing up the entire metal suspension rail, but when laying this metal suspension rail located above the pit, the Cheng consortium paid a huge price, with the difficulty of laying this metal suspension rail, the same manpower and material resources can at least lay more than ten times the length of the track in the middle area.

The number of people that could carry that rail car was only thirty or forty people at most, and it was too cost-effective to blow up a hard-won metal suspension for the sake of these thirty or forty daredevils.

In the eyes of this lieutenant colonel, the value of this track is much higher than these thirty or forty lives.

Soon, the power supply lines on the metal suspension rails were cut off by the garrison, and the searchlights on both sides of the metal suspension rails dimmed one after another, but the rail cars hanging under the suspension rails not only did not stop, but also increased their speed, rushing towards this end of the mine.

Due to the lack of lights, the sparks from the collision between the rail car and the metal suspension rail are particularly conspicuous in the darkness.

"Damn it!" The lieutenant colonel reacted instantly, this group of intruders, they transformed this rail car, this rail car did not use the electrical energy supplied by the suspension rail circuit, but used its own energy!

"Mark the target with tracer bullets, strafe with heavy machine guns!" The lieutenant colonel immediately gave a new order, the outer walls of the rail car were not too thick, and the bullets from the heavy machine gun could easily penetrate the car and kill and injure the people inside.

However, the intruder's modification of the rail car was not limited to energy, although the shell of the carriage made of alloy was quickly swept to pieces, judging by the sound of bullets colliding, it was obvious that a layer of armor was added to the inner wall of the carriage to resist the heavy machine gun shells of the point 50 caliber!

On the contrary, the machine gunners who shot exposed their targets in the darkness, and were constantly called by the snipers on the rail car, killing several people one after another.

"Sir...... Otherwise, let's blow up the suspension rails......" The lieutenant colonel's adjutant suggested tentatively, holding a pair of night-vision binoculars in his hand.

"No, for the sake of such a few people, I blew up the suspension rails, it's too cost-effective to send out the hundred family guards I brought, meet them at the terminal at this end of the mine, and kill them all as soon as they get off the train!" The lieutenant colonel clenched his hands into fists and said viciously.

The Cheng family's internal security force is an elite unit selected from the private army of the Cheng consortium, although the personal strength is not as good as the "Viper" unit carefully built by Cheng Yanqiu, but compared with the ordinary private soldiers, it is much stronger, and the equipment is also all newly developed large-caliber assault rifles, and the rifles are all equipped with expensive ACOG optical sights.

A hundred soldiers of the Internal Guard quickly reached the edge of the pit, took advantage of the surrounding favorable terrain, and aimed their guns at the concrete platform directly below the suspended rails.

This high platform is the terminus of the rail car.

As soon as the internal guard troops had set up their positions, the rail car had already reached the edge of the high platform and stopped.

Seeing this scene, the corners of the lieutenant colonel's mouth showed a hint of smugness, the rail car must stop here, even if it uses its own energy, it can't go any further, because further on, there is no metal suspension rail to support it.

The track, which was originally built to facilitate the passage of people through the pit, was not connected to the network of railcars within the shelter.

Those coming from across the pit must get off here and walk through the abandoned ore processing plant to the living quarters of Vault 909.

The railcar stopped, but the doors were tightly closed, and two soldiers from the internal guard tried to get up and throw the grenade into the window of the railcar, but suddenly the muzzle of a submachine gun protruded from one of the guns on the outer wall of the railcar, and instantly swept the two to the ground.

The crowd immediately returned fire, but the people in the car reacted very quickly, and immediately blocked the bullet hole with the armor plate after sweeping down the two people.

"Bring two bazookas"

An officer of the Internal Guard turned his head and said, but at this moment, more than a dozen grenades were suddenly thrown out of the window of the rail car in all directions, and these grenades had obviously calculated the detonation time, and before they could hit the ground, they exploded above the heads of the Internal Guard!

"Boom !!"

The completely defenseless internal guard troops were killed more than a dozen people in an instant, and the number of wounded was even greater, and the originally tight defense line was torn open several gaps at once

Originally, the muzzles of the internal guards were aimed at the doors and windows, but who knew that the people in the car actually blew a few holes directly in the body, and before they could move the muzzles, those who came out of the holes set up heavy folding bulletproof shields and built a temporary line of defense along the perimeter of the rail car.

"Shield?!" The lieutenant colonel who was holding a telescope to watch the battle understood that it turned out that the bullets that were padded on the inner wall of the rail car to block the bullets were these folding bulletproof shields, and the other party had already calculated their own arrangements, and even prepared directional door bombs used to open holes in the body

No matter how powerful the large-caliber rifles of the internal guard troops were, they could not even shoot through these shields with 50-caliber machine gun bullets, and under the cover of the shields, all the intruders in the carriage quickly got out, occupied the high platform of the terminal, and began to shoot condescendingly at the soldiers of the internal guard.

"Support! We need support! Bazookas, and mortars, shoot at that high platform! ”

"They rushed down, so fast! It's an evolutionary! There are evolutionaries among the invaders! Wrong! They...... They are all evolutionaries!! 2k reading network