Flash suppressor

Bullet exiting an A2-style flash suppressor, photographed with a high-speed air-gap flash
This image was taken from a high-speed Schlieren video of a flash suppressor. Schlieren imaging reveals the heat and pressure gradients invisible to standard imaging.
Detail of the birdcage-type flash suppressor on a SIG SG 550

A flash suppressor, also known as a flash guard, flash eliminator, flash hider, or flash cone, is a device attached to the muzzle of a rifle that reduces its visible signature while firing by cooling or dispersing the burning gases that exit the muzzle, a phenomenon typical of carbine-length weapons. Its primary intent is to reduce the chances that the shooter will be blinded in low-light shooting conditions. Contrary to popular belief, it is only a minor secondary benefit if a flash suppressor reduces the intensity of the flash visible to the enemy.[citation needed]

A flash suppressor is different from a muzzle brake, although they are typically mounted in the same position and sometimes confused with each other. While the former is intended to reduce visible flash, a muzzle brake is designed to reduce recoil inherent to large cartridges and typically does not reduce visible flash.[1]

  1. ^ DiMaio, Vincent J.M. (2002). Gunshot Wounds: Practical Aspects of Firearms, Ballistics, and Forensic Techniques, SECOND EDITION. Taylor & Francis. p. 79. ISBN 978-0-8493-8163-8.