A quick disconnect device for detachably holding a long gun or other elongated emergency tool (EET). The quick disconnect device receives and captures the ball of a ball-and-stem structure that is attached to the EET. The quick disconnect device may allow the EET to rotate about the central axis of the stem, but otherwise prevents relative translational and rotational motion between the EET and the quick disconnect device. The quick disconnect device is especially suitable for mounting to clothing, such as a utility belt or a ballistic vest. the quick disconnect device allows the EET to be inserted without requiring the user to directly manipulate the quick connection device, but requires the user to manipulate some sort of mechanism on the quick connect device in order to release the EET.