Abstract: A firearm flash arrestor device may include a housing having a housing cavity. An entrance cap, having an entrance aperture, may be coupled to a first end of the housing, and an exit cap, having an exit aperture, may be coupled to an opposing second end of the housing. The device may also include one or more baffles configured to be positioned within the housing cavity. Each baffle may include a baffle wall that may be coupled to a baffle plate, a central aperture that may be disposed in the baffle plate, and one or more peripheral apertures that may be formed into the baffle plate and baffle wall. The one or more baffles may be disposed in the housing cavity so that the central aperture of each baffle is aligned with the entrance aperture and exit aperture to provide a path for a projectile to travel through the device.