Capítulo 73: First Room.

The shadow spirit gave him a thumbs up and said, "You are good to go."

He nodded and put the ballistic shield in front of him. Then he stepped out of the elevator. He came face-to-face with 10 sentry guns. Each one had four 1.5-meter barrels capable of shooting 60g 12x99mm rounds at 900 meters per second and at a rate of 1500 of such rounds per minute. 

This was to be the first test. If he can't get past these guys, he can forget about entering the human farm or even leaving. 

The elevator closed behind him with a swish. Then the system controlling the turrets scanned him and identified him as an intruder. They didn't ask him to leave immediately. Instead, they opened fire directly. 

The small room he was in became loud with gunfire immediately as heavy bullets sailed through the air and smashed into his shield. They formed a wall of force that prevented him from going forward. In fact, they were pushing him back.