Brazen Bull Sentry Gun Trap Cyanide Box
Gibson, see for yourself.
— Hoffman hints at the secret room[src]

The Sentry Gun Trap is a trap from the Saw franchise, appearing in Saw 3D.

Design and Function

This trap consisted of a machine gun, which was mounted to a tripod. It was used for ambushes and to protect certain areas against invaders. The gun was connected to a sensor. Once this sensor detected an invader, the gun emerged from behind a cover and automatically aimed and fired at all targets in its range. (Saw 3D)


Mark Hoffman's Hideout

At one point, the identity of Detective Mark Hoffman, successor of the later John Kramer, better known as the Jigsaw Killer, was revealed to the Metropolitan Police Department by Jill Tuck, Jigsaw's ex-wife. Therefore, Hoffman created a complex plan to invade the police station and get his revenge on her after she was taken into protective custody by Officer Matt Gibson. Therefore, he set up a surveillance room in a hidden area of Pete's Auto Body, a junkyard at 58th Street, and secured it with the sentry gun. Afterwards, he wrote the words "Gibson, see for yourself" on a mirror hanging on the hidden door to the room and sent a video to Gibson, in which he demanded Jill Tuck.


Gibson aims his gun at Dan

Later that evening, Officer Palmer managed to trace the video to the junkyard and immediately informed Gibson. Only minutes later, he arrived at the junkyard and immediately went to the toilet room where Hoffman had written the message for him on the mirror, accompanied by two officers armed with shotguns. After securing the room, he quickly realized that the wall with the mirror was actually a hidden door. Therefore, he took the shotgun from one of his colleagues and smashed the mirror. After that, he broke through the door and entered the hidden hallway along with the officers. Thereby, they finally reached a surveillance room where they saw a hooded figure sitting in front of the monitors. Thinking it was Hoffman, Gibson aimed his gun at him and ordered him to show his hands. The person however didn't react. While holding him at gunpoint, Gibson carefully approached and ultimately kicked him off the chair. Upon doing so, he realized that the figure wasn't Hoffman, but Dan, a victim of a trap, which had been found earlier that evening at the junkyard. Initially confused, Gibson noticed an angel statue standing on a pedestal, which he had also seen on the video. He then took a look at the surveillance monitors, which showed the police station.

Gibson's corpse

When he saw that Hoffman had hacked their camera security system, he realized that Hoffman had hidden himself in Dan's body bag in order to infiltrate the station through the morgue. Therefore, he called Palmer and ordered her to call all officers back to the station immediately. However, before he could tell her the reason for his panic, the sentry gun previously set up by Hoffman emerged behind him and started to fire before he could react, thereby killing Gibson and the other officers while Palmer listened to the shots on the phone. (Saw 3D)


  • The machine gun used in the trap is a Soviet Pulemyot Kalashnikova Modernizirovanniy in BHI SOPMOD dress fitted with an EOTech sight. It is chambered in 7.62x54R.

 The gun "Sentry" is used in the games Portal, Portal 2, Team Fortress Classic and Team Fortress 2. It may be a reference.


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