When breaching the high school, Blane uses a suppressor on his pistol to eliminate the terrorist in the hallway. He then removes the suppressor before assaulting the library. The pistol does not have an extended threaded barrel, meaning there is no way to attach a suppressor. The way Blane removes the suppressor would suggest it was screwed into the rifling of the barrel itself, but this would cause the bullet to lodge either in the barrel or the suppressor.