Patent attributes
An example embodiment of a sound suppressor includes a shroud tube slidably and rotationally coupled to a vent tube. The vent tube is formed with a plurality of vent tube apertures in fluid communication with a bore extending from a first end to a second end of the vent tube. The shroud tube is formed with a plurality of shroud apertures in fluid communication with an interior void formed in the shroud tube. A rear cap attached to the vent tube is configured for attachment to the muzzle of a firearm. An indexing mechanism is configured for selectively holding the vent tube and shroud tube in an open-vent configuration with the apertures on both tubes overlapping one another, or in a closed-vent configuration with the apertures not overlapping. Sound suppression is enabled in the closed-vent configuration and minimized in the open-vent configuration.
