A suppressor is a device that is fitted to a weapon to silence the sound of the gun fire.

On at least one occasion in 1998, O'Neill and Teal'c placed suppressors onto the end of an MP5 M9 pistol, respectively, to take out the guards around Heru'ur on Cimmeria. (SG1: "Thor's Chariot")

In 2002, Agent Mark Devlin, who was disguised as Major Paul Davis, attached a suppressor to his weapon to kill Senator Kinsey, both on the Remington Model 700 and on the pistol. (SG1: "Smoke and Mirrors")

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